JP4109308B2 - Product sales data processing device - Google Patents

Description

  The present invention relates to a merchandise sales data processing apparatus such as an electronic cash register or a POS (Point Of Sales) system. In particular, the present invention acquires a tax-included price of a merchandise that has been entered for sale, and sells the merchandise based on the tax-included price. The present invention relates to a merchandise sales data processing apparatus for processing data.

  Currently, in Japan, a consumption tax is introduced as a tax imposed on personal consumption. In retail stores, an external tax method is generally used in which a consumption tax is calculated from a transaction amount at each transaction with a customer. Therefore, as a conventional POS system for consumption tax, the main unit price without tax is set in the product file corresponding to the product code of each product, and the transaction total memory and the tax exemption amount total memory are set in the POS terminal. What was provided was known (for example, refer patent document 1).

  In this conventional POS system, every time a product code of a product to be sold as one transaction is input to the POS terminal, the main price of the product is called from the product file and displayed on the display unit of the POS terminal, and the transaction total Add to memory and total taxable amount total memory respectively. Then, when the registration closing of this one transaction is declared, the consumption tax amount is calculated from the total amount of foreign tax in the total amount subject to foreign tax and the preset consumption tax rate, and this consumption tax amount is calculated in the amount of transaction total memory. To the total amount including tax. Then, the total amount including tax is displayed on the display unit and used as the amount charged to the customer.

By the way, in retail stores, some products may be temporarily discounted and sold, such as time services. In this case, first, the product code of the discount target product is input to the POS terminal. Then, the main unit price of the product is called from the product file and added to the transaction total memory and the tax exemption amount total memory. Next, the discount amount is input to the POS terminal. Then, the discount amount is subtracted from the total transaction memory and the total taxable amount memory. As described above, the conventional product discount is a discount for the main product price (excluding tax) of the product (see, for example, Patent Document 2).
Japanese Patent Laid-Open No. 6-301861 Japanese Patent No. 2542690

  Now, as a result of the tax system revision in Japan, the total amount display method that requires the display of the total payment amount including the amount equivalent to the consumption tax when prices are displayed on price tags and advertisements to consumers has been started. For this reason, discounts and discounts on merchandise will be made on prices that include tax, not on the conventional price.

  Therefore, the present invention is intended to provide a merchandise sales data processing apparatus capable of processing discounts or discounts on the tax-included price of merchandise.

  The present invention includes a tax-inclusive price acquisition unit that acquires a tax-inclusive price of a product that is input for sale, a product tax amount calculation unit that calculates a tax amount included in the tax-inclusive price from the tax-inclusive price and the tax rate of the product that is input for sale, If you input a tax-included discount for a product using this discount input device, the tax-included price will be subtracted from the tax-included price of the product and the tax-included tax will be included. Discount calculation means for calculating the price, and after-tax calculation means for calculating the tax amount included in the tax-included price after the tax-included price and the tax rate calculated by the discount calculation means. And a product tax amount changing means for changing the tax amount of the product for which the discount amount has been input by the discount amount input means to a tax amount calculated by the after-discount tax amount calculating means, and a description of the product sold and input as one transaction The receipt issuance means for issuing receipts printed with, and the tax amount calculated by the commodity tax amount calculation means is entered for all products sold and entered as one transaction for which the tax-included discount amount has not been entered. Transaction tax acquisition means for obtaining the total transaction tax amount changed by the product tax amount change means, and the transaction issued by the receipt issuing means for the transaction tax amount obtained by the transaction tax acquisition means. Transaction tax printing means for printing on the receipt.

  According to the present invention in which such a measure is taken, it is possible to provide a merchandise sales data processing apparatus that can accurately process a discount or a discount on a tax-included price of a merchandise and can cope with a total amount display method.

The best mode for carrying out the present invention will be described below with reference to the drawings.
In this embodiment, for convenience of explanation, it is assumed that the present invention is applied to a store where a sales tax of 5% is imposed on all products sold.

  FIG. 1 is a schematic diagram showing a merchandise sales data processing apparatus constructed in a store according to the present embodiment. This apparatus comprises a POS terminal 1 and a store computer 2. The POS terminal 1 and the store computer 2 are connected via a communication line 3 such as a LAN (Local Area Network) so as to be capable of bidirectional communication. A product file 4 is stored in the storage unit of the store computer 2.

  In the product file 4, as shown in FIG. 2, product data such as product names and prices are set in advance corresponding to the product codes unique to each product sold in the store. In order to correspond to the total amount display method, a tax-included price is set by adding the amount of consumption tax.

  FIG. 3 is a perspective view showing an external configuration of the POS terminal 1. The POS terminal 1 is provided with a keyboard 11, a mode switch 12 and an operator display 13 on the front of the main body, and a customer display 14 on the back. In addition, a printer 15 for printing a receipt is built in the main body, and a receipt printed by the printer 15 is discharged from a receipt issuing port 16. Further, a scanner 17 for optically reading a barcode such as a commodity code attached to each commodity is connected to the main body. Further, a drawer 18 for storing change or the like is formed integrally with the main body.

  FIG. 4 is a block diagram showing a main configuration of the POS terminal 1. The POS terminal 1 is provided with a CPU (Central Processing Unit) 21 as a control unit main body. Also, a ROM (Read Only Memory) 22 in which fixed data such as a program is stored in advance, a RAM (Random Access Memory) 23 in which various memory areas for storing rewritable data are rewritable, a current date , A clock unit 24 that measures time, a communication interface 25 that controls data communication with the store computer 2 that is a higher-level model connected via the communication line 3, and a mode selection signal from the mode switch 12 are input. An I / O port 26 that outputs an opening command signal to the drawer 18, a keyboard controller 27 that captures a key signal corresponding to an operation key from the keyboard 11, and a display controller that displays an image corresponding to display data on the operator display 13. 28, a display controller for displaying an image corresponding to the display data on the customer display 14 9, the printer controller 30 for controlling the printing operation of the printer 15, a scanner controller 31 to capture the bar code data read by the scanner 17 is provided. The CPU 21, ROM 22, RAM 23, clock unit 24, communication interface 25, I / O port 26, and controllers 27 to 31 of various input / output devices are connected by a bus line 32 such as an address bus or a data bus.

  As shown in FIG. 5, the keyboard 11 has a clear key 42, a PLU (Price Look Up) key 43, a subtotal key 44, and a deposit / cash key 45 as well as the numeric keys 41 of “0” to “9”. Various function keys such as a discount key 46, a discount key 47, and a cancel key 48 are provided. The PLU key 43 is a key for instructing that the numeric data is a product code. The subtotal key 44 is a key for instructing the total amount output of the merchandise sales transaction. The deposit / cash key 45 is a closing key for declaring the cash closing of the merchandise sales transaction. The discount key 46 is a key for instructing that the numeric data is a discount amount. The discount key 47 is a key for instructing that the numerical data is a discount rate.

  The mode switch 12 is an operation switch for instructing the CPU 21 to execute the business mode selected and operated from various business modes such as “registration”, “inspection”, and “settlement”. “Registration” means that when a product code of a product sold in a product sales transaction is input via the keyboard 11 or the input means of the scanner 17, the sales data of this product is registered in a predetermined memory area of the RAM 23, This is a business mode for issuing a receipt on which details of goods sold and sold in the transaction are printed when the closing of the transaction is declared. “Inspection” is a task of outputting a report of data registered in a predetermined memory area by a “registration” task. “Checkout” is a task of clearing data registered in a predetermined memory area after outputting a report similar to “check”.

  In addition to the above-mentioned memory area for registering product sales data, the RAM 23 has a tax rate memory 51 in which the current tax rate of consumption tax (5% = 0.05 in the present embodiment) is set as shown in FIG. 1. Set according to the registration start of one transaction and reset according to the registration closing of that transaction. Flag memory 52 of the flag being registered. 1. Set according to the total amount output of the transaction. Flag memory 53 of the subtotal flag to be reset, 1 receipt buffer 54 for storing receipt print data for 1 transaction, 1 item code of each product registered as transaction, tax-included price, tax amount, main unit price and discount data And a transaction buffer 55 for storing the total amount data.

  The POS terminal 1 configured as described above is sold by a barcode reading operation by the scanner 17 or a key input operation of the numeric key 41 and the PLU key 43 of the keyboard 11 in a state where the “registration” mode is selected by the mode switch 12. When the product code is input, the CPU 21 is programmed to start the product code input process shown in the flowchart of FIG.

  That is, when the product code input process is started, the CPU 21 first determines whether or not the registering flag in the flag memory 52 is set as ST (step) 1. Here, when the registration flag is reset, since it is the first item registration of one transaction, the CPU 21 clears the transaction buffer 55 and the receipt buffer 54 as ST2. In ST3, a registering flag is set. If the registering flag has already been set in ST1, the process of ST2 and 3 is not executed because it is the product registration for the second and subsequent items of one transaction.

  Next, the CPU 21 makes an inquiry to the store computer 2 with the product code input as ST4, and acquires product data such as a product name and a tax-inclusive price set corresponding to the product code from the product file 4 ( Tax-included price acquisition means). In this case, a copy file of the product file 4 may be downloaded in advance to the RAM 23 of the POS terminal 1, and the CPU 21 may search the copy file and acquire the corresponding product data. Further, when a barcode including a tax-included price such as an in-store marking barcode is scanned, the tax-included price may be acquired from the barcode.

  Next, the CPU 21 calculates a tax amount C included in the tax-included price A by the following formula (1) from the tax-included price A in the product data acquired as ST5 and the tax rate B of the tax rate memory 51. At this time, the fraction less than the minimum currency unit (1 yen) of the tax amount C is rounded by any one of rounding, rounding, or rounding (commodity tax amount calculation means).

C = A × (B / (1 + B)) (1)
Next, in step ST6, the CPU 21 calculates the main product price D of the sold product from the tax-included price A and the tax amount C according to the following equation (2).

D = A−C (2)
Next, the CPU 21 displays the product name and the tax-included price A in the product data acquired from the product file 4 (or its copy file) in ST7 on the operator display 13 and the customer display 14. Further, the CPU 21 stores the sales merchandise item data of the input merchandise code, the tax-included price A, the tax amount C, the main body price D, and the discount amount = 0 in order from the head area of the transaction buffer 55 as ST8. Furthermore, as ST9, the tax-included price A, the tax amount C, the main unit price D, and the discount amount = 0 stored each time are added to the total areas of the tax-included price, the tax amount, the main unit price, and the discount amount of the transaction buffer 55, respectively. Update total data. Thereafter, when the print data of the product name and the tax-included price A is stored in the receipt buffer 54 in ST10, the CPU 21 ends the current product code input process.

  Similarly, the POS terminal 1 is programmed so that the CPU 21 starts the discount key input process shown in the flowchart of FIG. 8 when the discount key 46 is operated and input in the “registration” mode.

  That is, when starting the discount key input process, the CPU 21 first determines whether or not the registering flag in the flag memory 52 is set as ST11. If the registering flag is set, it is determined in ST12 whether or not numerical data has been entered by the numeric key 41 immediately before the input of the discount key 46. If numerical data is entered, the value of this numerical data is acquired as a tax-included discount E as ST13 (discount input means). If the registering flag is reset, or if numerical data is not entered, an error is input to the discount key 46.

  Next, the CPU 21 checks the subtotal flag in the flag memory 53 as ST14. Here, when the subtotal flag is set, since a discount is instructed to the transaction amount, the subtotal discount process is executed. A description of the subtotal discount process is omitted.

  On the other hand, when the subtotal flag has been reset, since the discount of the sales commodity registered immediately before is instructed, the commodity discount processing of ST15 to ST22 is executed. That is, the CPU 21 acquires the sales merchandise detail data (product code, tax-included price A, tax amount C, body price D, discount amount = 0) stored immediately before in the transaction buffer 55 as ST15. Then, as ST16, from the tax-included price A and the tax-included discount amount E, the tax-included price F after the tax-included discount of the sales product is calculated by the following formula (3) (discount calculating means).

F = A−E (3)
Next, the CPU 21 calculates a discounted tax amount G included in the discounted tax-included price F by the following formula (4) from the tax-included price F after the tax-included discount and the tax rate B of the tax rate memory 51 as ST17. . At this time, the fraction less than the minimum unit of currency (1 yen) of the discounted tax amount G is rounded by the same rounding calculation method as that when calculating the tax amount C (after-tax tax calculation means).

G = F × (B / (1 + B)) (4)
Next, in step ST18, the CPU 21 calculates the main price H of the sales product after the tax-included discount from the after-tax-included price F and the after-tax tax amount G according to the following formula (5) Computing means).

H = F-G (5)
Next, in step ST19, the CPU 21 causes the operator display 13 and the customer display 14 to display the product name of the sale product and the tax-included price F after the tax-included discount (post-discount price display means). In addition, the tax-included price A, the tax amount C, the main unit price D, and the discount amount = 0 of the sales item description data registered immediately before in the transaction buffer 55 as ST20 are the tax-included price F, the tax amount G, and the main unit price after the tax-included discount, respectively. Change to H and discount amount E (product tax amount changing means). Furthermore, as ST21, the value of each total area of the tax-included price, the tax amount, the main body price, and the discount amount of the transaction buffer 55 is updated to the changed value. Thereafter, when the print data of the print item “product discount” and the tax-included discount E is stored in the receipt buffer 54 in ST22, the current discount key input process is terminated.

  Similarly, the POS terminal 1 is programmed so that the CPU 21 starts the subtotal key input process shown in the flowchart of FIG. 9 when the subtotal key 44 is operated and input in the “registration” mode.

  That is, when starting the subtotal key input process, the CPU 21 first determines whether or not the registering flag in the flag memory 52 is set as ST31. When the registering flag is reset, the subtotal key 44 is erroneously input without registering the merchandise for one transaction.

  When the registering flag is set, the CPU 21 determines the value of the tax-included price total area of the transaction buffer 55 as ST32, that is, the product for which the tax-included discount E is not input among all the products sold and input as one transaction. As a transaction amount, a value including a tax-inclusive price A is obtained, and for a product for which a tax-included discount amount E is input, a value obtained by subtracting the tax-included discount price E from the tax-included price A is obtained as a transaction amount. Further, as ST33, the value of the total tax amount area of the transaction buffer 55, that is, the tax amount C calculated by the product tax amount calculation means for the products for which the tax-included discount E is not input among all the products sold and input as one transaction, For a product for which the tax-included discount amount E is input, a value obtained by totaling the tax amounts G changed by the product tax amount changing unit is acquired as a transaction tax amount (transaction tax amount acquiring unit).

  Then, the CPU 21 displays the transaction amount on the operator display 13 and the customer display 14 in ST34. In ST35, the print item “subtotal” and the print data of the transaction amount are stored in the receipt buffer 54. Further, in ST36, the print item “internal tax amount” and the print data of the transaction tax amount are stored in the receipt buffer 54 (transaction tax amount printing means). Thereafter, if the CPU 21 sets the subtotal flag in the flag memory 53 in ST37, the current subtotal key process is terminated.

  Similarly, the POS terminal 1 is programmed so that the CPU 21 starts the closing key input process shown in the flowchart of FIG. 10 when a closing key, for example, the deposit / cash key 45 is input in the “registration” mode. Yes.

  That is, when starting the closing key input process, the CPU 21 first determines whether or not the subtotal flag of the flag memory 53 is set as ST41. If the subtotal flag is reset, it is an erroneous operation in which the closing key is input without outputting the transaction amount of one transaction, and therefore the input of the closing key is regarded as an error.

  If the subtotal flag has been set, the CPU 21 executes a registered tightening process corresponding to the type of the tightening key in ST42. For example, when the closing key is the deposit / current total key 45, the change amount is calculated by subtracting the transaction amount from the deposit amount, and the change amount is displayed on the operator display 13 and the customer display 14.

  Next, in step ST43, the CPU 21 stores print data of registration closing data (in the case of cash transaction, deposit amount, change amount, transaction number, purchase points, transaction time, etc.) in the receipt buffer 54, and then in step ST44, the receipt. The print data stored in the buffer 54 is output to the printer 15 to be printed on a receipt sheet (transaction tax amount printing means), and a receipt is issued (receipt issuing means).

  In addition, the CPU 21 stores the product code, the tax-included price, the tax amount, the main unit price, and the detailed data of the discount amount stored in the transaction buffer 55 as ST45 and the total data thereof from the communication interface 25 via the communication line 3. It transmits to the store computer 2. Thereafter, in ST46, both the registering flag and the subtotal flag in the flag memories 52 and 53 are reset, and the present closing key input process is terminated.

  In the store using the product sales data processing apparatus of the present embodiment configured as described above, the cashier operates the scanner 17 or the keyboard 11 of the POS terminal 1 and inputs the product code of the product purchased by the customer. . Then, the tax-included price of this product is displayed on the operator display 13 and the customer display 14. That is, the tax-inclusive price (total payment) that matches the price tag attached to each product under the total amount display method is displayed when the product is entered for sale.

  Here, if a predetermined amount of tax-included discount is specified for the product, the cashier enters the tax-included discount amount and then presses the discount key 46. Then, the tax-inclusive price after subtraction of the product is calculated by subtracting the tax-inclusive amount from the tax-inclusive price of the product. Then, the price including tax after the discount is displayed on the operator display 13 and the customer display 14.

  For example, it is assumed that data of the contents shown in FIG. 2 is set in the product file 4 and the cashier registers products in the order of product A, product B, and product E. First, when the product code of the product A is input, a tax amount of 10 yen and a body price of 200 yen are calculated from the tax-included price of the product A of 210 yen, and the transaction buffer 55 stores the record 61 of FIG. . Next, when the product code of the product B is input, the tax amount 15 yen and the body price 300 yen are calculated from the tax-included price 315 yen of the product B, and the transaction buffer 55 stores the record 62 of FIG. The

  Here, if the product B is a target product including tax discount of 50 yen, and the cashier enters the tax discount “50” and presses the discount key 46, the price including tax after discount 265 yen, the tax discount 12 Yen and the discounted main unit price 253 yen are calculated, and in the transaction buffer 55, the record 62 in FIG. 12A is updated to the record 63 in FIG.

  Thereafter, when the product code of the product E is input, the tax amount 5 yen and the main body price 100 yen are calculated from the tax-included price 105 yen of the product E, and the transaction buffer 55 stores the record 64 of FIG. .

  Next, when the subtotal key 44 is pressed, the amounts stored in the tax-included price total area of the transaction buffer 55, that is, for the products A and C for which the tax-included discount amount is not input, the tax-included prices of 210 yen and 105 yen are included. For the product B to which the discount amount is input, an amount of 580 yen, which is the total of the discounted tax-included price of 265 yen, is acquired as the transaction amount. Further, the amount stored in the total tax amount area of the transaction buffer 55, that is, the tax amounts of 10 yen and 5 yen included in the tax-included price of 210 yen and 105 yen for the products A and C, and the tax included after the discount for the product B A total amount of 27 yen is obtained as a transaction tax amount, which is a total of 12 yen included in the price of 265 yen. Since the transaction amount 580 yen is displayed on the operator display 13 and the customer display 14, the cashier may receive payment from the customer corresponding to the transaction amount 580 yen.

  Here, assuming that the customer has paid 1000 yen in cash, the cashier enters the deposit amount “1000” and presses the deposit / cash key 45. Then, the printer 15 is driven and a receipt 70 having the contents shown in FIG. 11 is issued. This receipt 70 is printed with the tax-included discount amount (-50) of the sales product (product B) for which the tax-included discount was applied, and the transaction amount after the tax-included discount (subtotal ¥ 580) of the sales product. The transaction tax included in the amount (including tax ¥ 27) is printed. Therefore, the customer can easily confirm the tax-included discount information and the tax amount included in the transaction amount from the printed contents of the receipt 70. In addition, when displaying the transaction amount of 580 yen in accordance with the input of the subtotal key 44, the transaction tax amount of 27 yen may also be displayed so that the customer can confirm the tax amount included in the transaction amount before payment.

  In addition, in accordance with the input of the deposit / cash key 45, the data including the tax-included price, the tax amount, the main unit price, and the discount amount stored in the transaction buffer 55 is transmitted to the store computer 2 via the communication line 3. Is done. Accordingly, the store computer 2 can manage sales of sales products that are tax-inclusive based on the tax-inclusive price after the tax-inclusive discount, or can be managed by the main unit price after the tax-inclusive discount.

  As described above, according to the present embodiment, the price after discount displayed when the discount amount is input with respect to the tax-included price of the product is the price including tax, and therefore corresponds to the total amount display method. Moreover, since it can be handled by the same operation as before, the burden on the cashier does not increase even after the total amount display method is introduced.

  In the above embodiment, every time the product code of the sales product is input, the tax amount is calculated from the tax-included price of the product, and when the tax-included discount amount is input for the sales product, the tax is included after the discount. Calculate the discounted tax amount from the price and change the tax amount of the product to the discounted tax amount. Then, in the total tax amount area of the transaction buffer 55, the tax amount calculated from the tax-inclusive price is input for the products for which the tax-inclusive discount amount has not been input among all the products sold and input as one transaction. For products, the transaction amount is obtained by totaling the amount of tax calculated from the price including tax after discounting, but the means for obtaining the transaction tax amount is not limited to this.

  Then, next, 2nd Embodiment using another structure as a transaction tax amount acquisition means is described using FIGS. 13-16. For convenience of explanation, portions common to the first embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

  FIG. 13 is a schematic diagram showing main memory areas formed in the RAM 23 of the POS terminal 1. In other words, in the second embodiment, instead of the transaction buffer 55, the immediately preceding registration memory 56 for storing the product name and the tax-included price of the sale product for which the product code has been input immediately before, the tax-included price totalizer 57, The discount sum total 58 is formed.

  Thus, the POS terminal 1 is programmed so that the CPU 21 starts the product code input process shown in the flowchart of FIG. 14 when the product code of the sales product is input in the “registration” mode.

  That is, when starting the product code input process, the CPU 21 first determines whether or not the registering flag in the flag memory 52 is set as ST51. Here, if the registration flag is reset, since it is the first item registration of one transaction, the CPU 21 clears the tax-inclusive price totalizer 57, the discount totalizer 58 and the receipt buffer 54 as ST52. In ST53, a registration flag is set. If the registering flag has already been set in ST51, the processing of ST52 and 53 is not executed because it is the product registration for the second and subsequent items of one transaction.

  Next, the CPU 21 acquires product data such as a product name and a tax-inclusive price set corresponding to the product code from the product file 4 in ST54 (tax-inclusive price acquisition means). In ST55, the product name and the price including tax are displayed on the operator display 13 and the customer display 14. In ST56, the product name and the price including tax are overwritten and stored in the immediately preceding registration memory 56. Furthermore, this tax-inclusive price is added to the tax-inclusive price totalizer 57 as ST57. Thereafter, when the print data of the product name and the tax-included price A is stored in the receipt buffer 54 in ST58, the CPU 21 ends the current product code input process.

  Similarly, the POS terminal 1 is programmed such that when the discount key 46 is operated and input in the “registration” mode, the CPU 21 starts the discount key input process shown in the flowchart of FIG. 15. As shown in the figure, the discount key input process is different from the first embodiment in the product discount process of ST61 to ST65.

  That is, when confirming that the subtotal flag is reset in ST14, the CPU 21 obtains the data of the product name and tax-included price A of the product registered immediately before the discount key 46 is input from the immediately preceding registration memory 56 as ST61. . In ST62, the tax-included discount price E is subtracted from the tax-included price A to calculate the tax-included price F after the discount (discount calculation means).

  Next, the CPU 21 displays the product name and the discounted tax-included price F on the operator display 13 and the customer display 14 as ST63. In ST64, the tax-included discount amount E is added to the discount sum total 58. Thereafter, when the print data of the print item “product discount” and the tax-included discount E is stored in the receipt buffer 54 in ST65, the current discount key input process is terminated.

  Similarly, the POS terminal 1 is programmed such that when the subtotal key 44 is operated and input in the “registration” mode, the CPU 21 starts the subtotal key input process shown in the flowchart of FIG. 16.

  That is, when starting the subtotal key input process, the CPU 21 first determines whether or not the registering flag in the flag memory 52 is set as ST71. The transaction amount K is calculated by subtracting the total discount amount of the discount totalizer 58 from the total price amount (transaction amount acquisition means).

  After calculating the transaction amount K, the CPU 21 calculates a transaction tax amount L by the following equation (6) from the transaction amount K and the tax rate B set in the tax rate memory 51 as ST73 (transaction tax amount calculation means).

L = K × (B / (1 + B)) (6)
Then, the CPU 21 displays the transaction amount K on the operator display 13 and the customer display 14 as ST74. In ST75, the print data of the print item “subtotal” and the transaction amount K are stored in the receipt buffer 54. Further, in ST76, the print data of the print item “tax amount” and the transaction tax amount L are stored in the receipt buffer 54 (transaction tax amount printing means). Thereafter, if the CPU 21 sets the subtotal flag in the flag memory 53 in ST77, the current subtotal key process is terminated.

  In the second embodiment, the closing key process executed by the CPU 21 is the same as that of the first embodiment except for the process of ST45.

  Thus, also in the second embodiment, since the price after the discount displayed when the tax-included price is included in the tax-included price of the product is the tax-inclusive price, it corresponds to the total amount display method. . Moreover, since it can be handled by the same operation as before, the burden on the cashier does not increase even after the total amount display method is introduced. In addition, since the transaction amount (included in the transaction amount) included in the transaction amount is printed on the receipt 70 after the tax-included transaction amount (subtotal) of the sales product, the customer can easily determine the tax amount included in the transaction amount. There is an effect that can be confirmed.

  By the way, in each of the above-described embodiments, the product discount in which the tax-included price of the product is discounted by an arbitrary tax-inclusive discount amount has been described. However, the present invention is a product discount that discounts the tax-inclusive price of the product at an arbitrary discount rate. Can be applied similarly.

  Next, a third embodiment in which the present invention is applied to product discount will be described with reference to FIGS. 17 and 18. The third embodiment is a case where the present invention is applied to the merchandise sales data processing apparatus of the first embodiment, and the configuration shown in FIGS. 1 to 10 is used as it is, so the description here is omitted. To do.

  FIG. 17 is a flowchart showing the main part of the discount key process executed by the CPU 21 of the POS terminal 1 in the “registration” mode. That is, when the discount key 47 is operated and input in the “registration” mode, the CPU 21 determines whether or not the registering flag in the flag memory 52 is set in ST81. If the registration flag is set, it is determined in ST82 whether or not numerical data has been entered using the numeric key 41 just before the discount key 47 is input. If numerical data is entered, the value of this numerical data is acquired as a discount rate M in ST83 (discount rate input means). If the registering flag has been reset, or if numerical data has not been entered, the input of the discount key 47 is regarded as an error.

  Next, the CPU 21 checks the subtotal flag in the flag memory 53 in ST84. Here, when the subtotal flag is set, a discount is instructed for the transaction amount, so the subtotal discount process is executed. A description of the subtotal discount process is omitted.

  On the other hand, if the subtotal flag has been reset, since the discount of the sales product registered immediately before has been instructed, the product discount process of ST85 to ST93 is executed. That is, the CPU 21 obtains sales merchandise item data (product code, tax-included price A, tax amount C, body price D, discount amount = 0) stored immediately before in the transaction buffer 55 as ST85. Then, in ST86, the discounted tax price N of the sales product is calculated from the tax-included price A and the discount rate M by the following formula (7) (discount calculation means).

N = A × (1-M) (7)
Next, in step ST87, the CPU 21 calculates a tax-included discount amount P by discount from the tax-included price A before discount and the tax-included price N after discount according to the following formula (8).

P = A−N (8)
Further, the CPU 21 calculates a discounted tax amount Q included in the discounted tax-included price N from the following formula (9) from the discounted tax-included price N and the tax rate B of the tax rate memory 51 as ST88. At this time, the fraction of the discounted tax amount Q less than the minimum currency unit (1 yen) is rounded by any one of rounding, rounding or rounding up (discounted tax amount calculation means).

Q = N × (B / (1 + B)) (9)
Next, in step ST89, the CPU 21 calculates the discounted main body price R of the sales product from the discounted tax-included price N and the discounted tax amount Q according to the following equation (10) (discounted main body price calculating means).

R = NQ (10)
Next, in ST90, the CPU 21 displays the product name of the sale product and the discounted tax price N on the operator display 13 and the customer display 14 (discounted price display means). Also, as ST91, the tax-included price A, the tax amount C, the base price D, and the discount amount = 0 of the sales item description data registered immediately before in the transaction buffer 55 are set to the discounted tax-included price N, tax amount Q, base price R, and Change to discount amount P (product tax amount changing means). Further, in ST92, the values of the total areas of the transaction buffer 55 including the tax-included price, the tax amount, the main body price, and the discount amount are updated to the changed values. After that, if the print data of the print item “product discount”, the discount rate M, and the tax-included discount amount P is stored in the receipt buffer 54 in ST93, the CPU 21 ends the discount key input process this time.

  Also in the third embodiment including the discount key input processing of such a configuration, the discounted price displayed when there is a discount for the tax-included price of the product is the price including the tax, so that it corresponds to the total amount display method It becomes. Moreover, since it can be handled by the same operation as before, the burden on the cashier does not increase even after the total amount display method is introduced.

  Further, for example, the data of the content shown in FIG. 2 is set in the product file 4, the cashier registers the product in the order of the product A, the product B, and the product E, and the product B is discounted by 5%. Then, the receipt 71 of the print content shown in FIG. 18 is issued. On this receipt 71, the discount rate (5%) of the discounted sales product (product B) and the discount amount (-16) are printed, and the transaction amount after the sales product discount (subtotal ¥ 614) and The transaction tax amount (included tax amount ¥ 29) included in the transaction amount is printed. Therefore, the customer can easily confirm the discount information and the tax amount included in the transaction amount from the printed contents of the receipt 71.

  Next, a fourth embodiment in which the present invention is applied to product discount will be described with reference to FIG. This fourth embodiment is a case where the present invention is applied to the merchandise sales data processing apparatus of the second embodiment, and the configurations of FIGS. 13, 14 and 16 are used as they are. Description is omitted.

  FIG. 19 is a flowchart showing the main part of the discount key process executed by the CPU 21 of the POS terminal 1 in the “registration” mode. As shown in the figure, the discount key input process is different from the third embodiment in the product discount process of ST101 to ST106.

  That is, when confirming that the subtotal flag has been reset in ST84, the CPU 21 acquires the product name and tax-included price A data of the product registered immediately before the discount key 47 is input from the immediately preceding registration memory 56 in ST101. In ST102, the discounted tax price N of the sales product is calculated from the tax-inclusive price A and the discount rate M by the above formula (7) (discount calculation means).

  Next, in step ST103, the CPU 21 calculates a tax-included discount amount P by discount from the tax-included price A before discount and the tax-included price N after discount according to the equation (8) (discount amount calculation means).

  Next, the CPU 21 displays the product name and the discounted tax-included price N on the operator display 13 and the customer display 14 as ST104. In ST105, the discount amount P including tax is added to the discount totalizer 58. Thereafter, when the print data of the print item “product discount”, the discount rate M, and the tax-included discount amount P is stored in the receipt buffer 54 in ST106, the current discount key input process is terminated.

  Also in the fourth embodiment, the POS terminal 1 is programmed so that the CPU 21 starts the subtotal key input process shown in the flowchart of FIG. 16 when the subtotal key 44 is operated and input in the “registration” mode. Yes. That is, the transaction amount K is calculated by subtracting the discount amount total amount of the discount amount total device 58 from the tax-included price total amount of the tax-included price total device 57 (transaction amount acquisition means). Then, from this transaction amount K and the tax rate B set in the tax rate memory 51, a transaction tax amount L is calculated by the above equation (6) (transaction tax amount calculation means), and this transaction tax amount L is printed on a receipt sheet. (Transaction tax amount printing means), a receipt is issued (receipt issuing means).

  Therefore, also in the fourth embodiment, the same effect as in the third embodiment can be obtained.

The schematic diagram which shows one Embodiment of the merchandise sales data processing apparatus of this invention. The schematic diagram which shows the data structure of the goods file used in the embodiment. The external appearance perspective view of the POS terminal in the embodiment. The block diagram which shows the principal part structure of the POS terminal. The schematic diagram which shows the various keys arrange | positioned at the keyboard of the POS terminal. The flowchart which shows the main memory areas formed in RAM of the POS terminal. The flowchart which shows the principal part of the merchandise code input process which CPU of the POS terminal performs. The flowchart which shows the principal part of the discount key input process which CPU of the same POS terminal performs. The flowchart which shows the principal part of the subtotal key input process which CPU of the same POS terminal performs. The flowchart which shows the principal part of the closing key input process which CPU of the same POS terminal performs. The schematic diagram which shows an example of the receipt printed and issued from the POS terminal. The schematic diagram which shows an example of the data stored in the transaction buffer formed in RAM of the POS terminal. The schematic diagram which shows the main memory areas formed in RAM of the POS terminal in the 2nd Embodiment of this invention. The flowchart which shows the principal part of the merchandise code input process which CPU of a POS terminal performs in the said 2nd Embodiment. The flowchart which shows the principal part of the discount key input process which CPU of a POS terminal performs in the 2nd Embodiment. The flowchart which shows the principal part of the subtotal key input process which CPU of a POS terminal performs in the said 2nd Embodiment. The flowchart which shows the principal part of the discount key input process which CPU of the POS terminal performs in the 3rd Embodiment of this invention. The schematic diagram which shows an example of the receipt printed and issued from the POS terminal in the said 3rd Embodiment. The flowchart which shows the principal part of the discount key input process which CPU of a POS terminal performs in the 4th Embodiment of this invention.

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... POS terminal, 2 ... Store computer, 4 ... Product file, 11 ... Keyboard, 13 ... Display for operator, 14 ... Display for customer, 15 ... Printer, 17 ... Scanner, 21 ... CPU, 51 ... Tax rate memory, 55 ... Transaction buffer, 70, 71 ... Receipt.

Claims (2)

Tax-included price acquisition means to acquire the tax-included price of the product entered for sale,
Product tax amount calculation means for calculating the tax amount included in the tax-inclusive price from the tax-inclusive price and tax rate of the product entered for sale,
A discount input means for inputting a tax-included discount for the product;
When the tax-included discount amount of the product is input by the discount input unit, a discount calculation unit that subtracts the tax-included discount amount from the tax-included price of the product to calculate a tax-included price after the tax-included discount;
A discounted tax amount calculation means for calculating a tax amount included in the tax-inclusive price after the tax-included discount from the tax-included price after the tax-inclusive calculation calculated by the discount calculation means and the tax rate;
Commodity tax amount changing means for changing the tax amount of the commodity for which the discount amount is input by the discount amount input means to the tax amount calculated by the after-discount tax amount calculating means;
A receipt issuing means for issuing a receipt on which the details of a product entered as a sale are printed;
Of all the products sold and entered as one transaction, the tax calculated by the product tax amount calculation means for the products for which the tax included discount amount has not been input, and the product tax amount change for the products for which the tax included discount amount has been input A transaction tax amount acquisition means for acquiring a transaction tax amount obtained by totaling the tax amounts changed by the means;
Transaction tax amount printing means for printing the transaction tax amount obtained by the transaction tax amount acquisition means on a receipt of the transaction issued by the receipt issuing means;
A product sales data processing apparatus characterized by comprising: Tax-included price acquisition means to acquire the tax-included price of the product entered for sale,
Product tax amount calculation means for calculating the tax amount included in the tax-inclusive price from the tax-inclusive price and tax rate of the product entered for sale,
A discount rate input means for inputting a discount rate of the product;
When a discount rate of the product is input by the discount rate input means, discount calculation means for discounting the tax-included price of the product with the discount rate and calculating a discounted tax-included price;
A discounted tax amount calculation means for calculating a tax amount included in the discounted tax-included price from the discounted tax-included price calculated by the discount calculation means and the tax rate;
Product tax amount changing means for changing the tax amount of the product for which the discount rate is input by the discount rate input means to the tax amount calculated by the discounted tax amount calculating means;
A receipt issuing means for issuing a receipt on which the details of a product entered as a sale are printed;
Of all the products that are sold and entered as one transaction, the tax amount calculated by the product tax amount calculating means is used for the products for which the discount rate is not input, and the product tax amount changing means is used for the products for which the discount rate is input. A transaction tax amount acquisition means for acquiring a transaction tax amount obtained by totaling the changed tax amounts,
Transaction tax amount printing means for printing the transaction tax amount obtained by the transaction tax amount acquisition means on a receipt of the transaction issued by the receipt issuing means;
A product sales data processing apparatus characterized by comprising:

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