JP2005284759A - Merchandise sales data processor - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To present a transaction sum including tax after discount or reduction in price when discount or reduction in price is operated to transaction. <P>SOLUTION: The price including tax of sold and inputted merchandise is acquired. The prices including tax of all merchandise sold and inputted as one transaction are totaled. In this case, when a discount sum including tax for one transaction is inputted, the discount sum including tax is subtracted from the total sum including tax so that the total sum including tax after reduction in price including tax can be calculated. Then, the total sum including tax after reduction in price including tax is displayed. <P>COPYRIGHT: (C)2006,JPO&NCIPI

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, and in particular, acquires a tax-included price of each merchandise that has been entered for sale, and based on this tax-included price, The present invention relates to a merchandise sales data processing apparatus that processes sales 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 a retail store, a discount or a discount may be given to the total amount of transactions for customers who bring a service ticket such as a discount ticket and customers who have accumulated a predetermined number of service points. In this case, the cashier operating the POS terminal first inputs the product codes of the products purchased by the customer in sequence, and inputs the subtotal key when the input is completed. As a result, the total body price of each product is stored in the transaction total memory and the tax exemption amount total memory. In addition, the total amount including tax is calculated and displayed. Next, enter the discount amount or discount rate. Then, the discount amount or the discount amount is subtracted from the total body price of the transaction total memory and the taxable amount total memory. Then enter the key. Then, the consumption tax amount is calculated from the discount of the total amount subject to external tax or the discounted main unit price, and after the discount or discount, the consumption tax amount is added to the transaction total memory discount or the total base price after discount. The total amount including tax is calculated. And the registration closing process was performed with respect to this tax-included discount amount (for example, refer 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 transactions were made for the total price including tax, not for the total price of the main body.

  Therefore, the present invention intends to provide a merchandise sales data processing apparatus capable of processing discounts or discounts on the total price including tax of one transaction.

  The present invention inputs a tax-inclusive price acquisition unit for acquiring a tax-inclusive price of a product inputted for sale, a tax-inclusive price summing unit for summing up the tax-inclusive prices of all products sold and input as one transaction, and a discount rate for one transaction. When a discount rate input means, a discount rate for one transaction is input, a discount calculation means for calculating the total tax-included amount after discounting by discounting the total tax-included amount at a discount rate, To the discounted tax amount calculating means for calculating the tax amount included in the total amount including tax after the discount, and the discounted tax amount output means for outputting the tax amount calculated by this means.

  According to the present invention in which such measures are taken, it is possible to accurately process discounts or discounts on the total price including tax of one transaction, and it is possible to provide a merchandise sales data processing apparatus that can support the 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 5% consumption tax 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. The price data is data of a tax-included price obtained by adding the amount of consumption tax to correspond to the total amount display method.

  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 using 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. 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. In addition, 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 (tax-included price acquisition means).

  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 of the tax amount C less than the minimum currency unit (1 yen) is rounded by any one of rounding, rounding or rounding.

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 (Tax-inclusive price total means). 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 subtotal key input process shown in the flowchart of FIG. 8 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 ST11. When the registering flag is reset, the subtotal key 44 is erroneously input without registering the merchandise for one transaction.

  If the registering flag is set, the CPU 21 transacts the value including the tax-inclusive price total area of the transaction buffer 55 as ST12, that is, the total amount including tax including the tax-inclusive price A of all products sold and input as one transaction. Get as an amount. In ST13, the value of the total tax amount area of the transaction buffer 55, that is, the total value of the tax amount C included in the tax-included price A of all products sold and input as one transaction is acquired as the transaction tax amount.

  Then, the CPU 21 displays the transaction amount on the operator display 13 and the customer display 14 as ST14. In ST15, the print item “subtotal” and the print data of the transaction amount are stored in the receipt buffer 54. Further, in ST16, the print item “internal tax amount” and the print data of the transaction tax amount are stored in the receipt buffer 54. Thereafter, if the subtotal flag of the flag memory 53 is set in ST17, the CPU 21 ends the current subtotal key 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. 9 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 ST21. If the registering flag is set, it is determined in ST22 whether or not numerical data has been entered using 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 ST23 (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 ST24. Here, when the subtotal flag is reset, the discount is instructed to the product, and the product discount process is executed. A description of the product discount process is omitted.

  On the other hand, when the subtotal flag is set, since discount is instructed for one transaction, the transaction discount process of ST25 to ST33 is executed. In other words, the CPU 21 calculates the transaction including the tax-included price in accordance with the following formula (3) from the transaction amount (total amount including tax) F and the tax-included discount amount E stored in the tax-included price total area of the transaction buffer 55 as ST25. The transaction amount G is calculated (discount calculation means).

G = FE (3)
Next, the CPU 21 calculates the discounted tax amount H included in the discounted transaction amount G from the transaction amount G after the tax-included discount and the tax rate B of the tax rate memory 51 in ST26 by the following equation (4). . At this time, the fraction less than the minimum unit of currency (1 yen) of the discounted tax amount H is rounded by the same rounding calculation method as that for calculating the tax amount C (after-tax tax calculation means).

H = G × (B / (1 + B)) (4)
Next, in step ST27, the CPU 21 apportions the tax-included discount amount E for one transaction for each product according to the ratio of the tax-included price of each product sold and input in the one transaction. Specifically, if the tax-included price of the product a is X, the tax-included price of the product b is Y (X> Y), and the total amount is Z, the apportioned discount h1 of the product a having a large tax-included price is expressed by the following formula ( 5), and the apportioned discount h2 of the product b with a small tax-inclusive price is calculated by the following formula (6) (discount apportioning means).

h1 = E × (X / Z) (5)
h2 = E−h1 (6)
Next, the CPU 21 calculates the value according to the following formulas (7) to (9) from the tax-included price A of each item specification data stored in the transaction buffer 55 as ST28 and the apportioned discount h of the item corresponding to the data. The tax-included price A ′, the tax amount C ′, and the main body price D ′ after calculation are calculated.

A ′ = A−h (7): (Price calculation means by product after discount)
C ′ = A ′ × (B / (1 + B)) (8): (Tax calculation means for each product after discount)
D ′ = A′−C ′ (9): (Body price calculation means by product after discount)
Thus, if the tax-included price A ′, the tax amount C ′, and the main unit price D ′ after the discount are recalculated for each product, the CPU 21 stores the product detail data in the transaction buffer 55 as the data after the discount as ST29. Change to In ST30, the total area values of the transaction buffer 55 including the tax-included price, the tax amount, the main unit price, and the discount amount are updated to the changed values.

  Thereafter, the CPU 21 displays the discounted transaction amount G on the operator display 13 and the customer display 14 as ST31 (total display means after discount). In ST32, print data of the print item “subtotal discount” and the tax-included discount E is stored in the receipt buffer 54. Further, if the print data of the print item “tax amount” and the discounted tax amount H is stored in the receipt buffer 54 in ST33 (after-discount tax amount output means), the current discount key input process is terminated.

  The POS terminal 1 is programmed such that when the discount key 47 is operated and input in the “registration” mode, the CPU 21 starts the discount key input process shown in the flowchart of FIG.

  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 ST41. If the registering flag is set, it is determined in ST42 whether or not numerical data has been entered using the numeric key 41 immediately before the discount key 47 is input. If numerical data is entered, the value of this numerical data is acquired as a discount rate J (discount rate input means) in ST43. 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 as ST44. Here, when the subtotal flag is reset, a discount is instructed for the product, and the product discount process is executed. A description of the product discount process is omitted.

  On the other hand, when the subtotal flag is set, since discount is instructed for one transaction, the transaction discount process of ST45 to ST54 is executed. That is, the CPU 21 calculates the transaction amount after discounting the transaction according to the following equation (10) from the value of the transaction amount (total amount including tax) F stored in the tax-included price total area of the transaction buffer 55 as ST45 and the discount rate J. K is calculated (discount calculation means).

K = F × (1-J) (10)
Next, the CPU 21 calculates a discount amount L when the transaction amount F is discounted at a discount rate J from the transaction amount F before discount and the transaction amount K after discount as ST46 by the following equation (11) (discount). Amount calculation means).

L = F−K (11)
Next, in ST47, a discounted tax amount M included in the discounted transaction amount K is calculated from the discounted transaction amount K and the tax rate B in the tax rate memory 51 by the following equation (12). At this time, the fraction less than the minimum unit of currency (1 yen) of the discounted tax amount M is rounded by the same rounding calculation method as that for calculating the tax amount C (discounted tax amount calculation means).

M = K × (B / (1 + B)) (12)
Next, in step ST48, the CPU 21 distributes the discount amount L for one transaction according to the ratio of the tax-included price of each product sold and input in the one transaction in the same manner as ST27 of the discount key input process. (Discount amount apportioning means).

Next, in step ST49, the CPU 21 performs the tax-included price A of each item specification data stored in the transaction buffer 55 and the apportioned discount for the item corresponding to the data, as in step ST28 of the discount key input process. Calculate the discounted tax-included price A ′, tax amount C ′, and base price D ′ from the amount h (price calculation means by discounted product), (tax calculation means by discounted product), (base price by discounted product) Calculation means)
Thus, if the discounted tax-included price A ′, tax amount C ′, and body price D ′ are recalculated for each product, the CPU 21 changes each product detail data in the transaction buffer 55 to the discounted data as ST50. To do. In ST51, 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.

  Thereafter, the CPU 21 displays the discounted transaction amount K on the operator display 13 and the customer display 14 as ST52 (total discount display means). In ST53, the print data of the print item “subtotal discount”, the discount rate J, and the discount amount L is stored in the receipt buffer 54. Furthermore, if the print data of the print item “internal tax amount” and the discounted tax amount M is stored in the receipt buffer 54 in ST54 (discounted tax amount output means), the current discount key input process is terminated.

  The flag memory of the service flag is provided in the RAM 23, and the service flag is set when the discount key input process or the discount key input process is executed in one transaction. When this service flag is set, the discount key input process or the discount key input process is prohibited, and both discount and discount services are executed simultaneously for one transaction. You may make it prohibit.

  The POS terminal 1 is programmed so that the CPU 21 starts the closing key input process shown in the flowchart of FIG. 11 when the closing key, for example, the deposit / cash key 45 is operated and input in the “registration” mode.

  That is, when starting the closing key input process, the CPU 21 first determines whether or not the subtotal flag in the flag memory 53 is set in ST61. 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 is set, the CPU 21 executes a registered tightening process corresponding to the type of the tightening key in ST62. 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, the CPU 21 stores print data of registration closing data (deposit amount, change amount, transaction number, purchase points, transaction time, etc. in the case of a cash transaction) in the receipt buffer 54, and then a receipt as ST64. The print data stored in the buffer 54 is output to the printer 15 to be printed on receipt paper, 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, the detailed data of the discount amount and the total data thereof stored in the transaction buffer 55 as ST 65 from the communication interface 25 via the communication line 3. It transmits to the store computer 2. Thereafter, in ST66, 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.

  When the customer finishes inputting the product codes of all products purchased by the customer, the cashier operates and inputs the subtotal key 44. Then, the total price including tax of all products purchased by the customer is displayed on the operator display 13 and the customer display 14 as a transaction amount. Here, for example, assuming that a discount service is performed for the customer, the cashier places a discount amount and then presses the discount key 46. Then, the transaction amount after the discount is calculated by subtracting the discount amount from the transaction amount which is the total amount of the price including tax. Then, the transaction amount after the discount is displayed on the operator display 13 and the customer display 14. Therefore, the cashier only needs to receive payment from the customer corresponding to the transaction amount after the discount.

  For example, if a discount service is to be implemented for the customer, the cashier enters the discount rate and then presses the discount key 47. Then, the discount amount is calculated from the transaction amount and the discount rate, and the discount amount is further subtracted from the transaction amount to calculate the discounted transaction amount. The discounted transaction amount is displayed on the operator display 13 and the customer display 14. Therefore, the cashier only needs to receive payment from the customer in accordance with the discounted transaction amount.

  For example, the data shown in FIG. 2 is set in the product file 4, and the cashier registers the product in the order of product A and product E, and after pressing the subtotal key 44, inputs 10% discount. Suppose that First, when the product code of the product A is input, a tax amount of 10 yen and a main unit price of 200 yen are calculated from the tax-included price of 210 yen of the product A, and the transaction buffer 55 stores the record 61 of FIG. . Next, when the product code of the product E is input, a tax amount of 5 yen and a body price of 100 yen are calculated from the tax-included price of 105 yen of the product E, and the transaction buffer 55 stores the record 62 of FIG. The

  Next, after the cashier presses the subtotal key 44, when the discount rate “10” is entered and the discount key 47 is pressed, a discount amount of 32 yen and a discounted tax-included price of 283 yen are calculated. Further, the discount amount of 32 yen is prorated according to the ratio of the tax-included price of the product A of 210 yen and the tax-included price of the product B of 105 yen. That is, a discount amount of 21 yen is calculated for the product A, and a discount amount of 11 yen is calculated for the product B. As a result, the product detail data for the product A is changed to the record 63 in FIG. 13B, and the product detail data for the product B is changed to the record 64 in FIG. Since the discounted transaction amount 283 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 283 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. 12 is issued. On this receipt 70, the discounted transaction amount (subtotal ¥ 283) and the tax amount (inclusive tax amount ¥ 13) included in this transaction amount are printed. Therefore, the customer can easily confirm the discounted transaction amount and the tax amount included in the printed content of the receipt 70. When displaying the discounted transaction amount 283 yen, the discounted tax amount 13 yen may also be displayed so that the customer can confirm the tax amount included in the transaction amount before payment.

  The discount amount of 32 yen is prorated according to the ratio of the tax-included prices of the registered products A and B, and is subtracted from the tax-included price of the products. Accordingly, since the sales decrease due to the discount on the transaction is subtracted from the sales of each product sold in the transaction, the sales of each product can be accurately managed. In addition, the tax-included price, tax amount, main unit price, and discount amount data of each sale product stored in the transaction buffer 55 in response to the input of the deposit / cash key 45 is transmitted to the store computer 2 via the communication line 3. Is done. Therefore, in the store computer 2, the sales of each product can be managed by the discounted tax-included price, or can be managed by the discounted main unit price.

  As described above, according to the present embodiment, the transaction amount after discount or discount displayed when each product is discounted or discounted for a transaction registered with a tax-inclusive price is an amount including tax. It corresponds to the total amount display method. Moreover, since discounts or discounts 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-described embodiment, the discount amount or discount amount is apportioned by the ratio of the tax-included price of all registered products, and the tax-included price, tax amount and base price are changed based on the apportionment amount or discount amount allocated to each product. However, after the discounted tax amount or discounted tax amount is apportioned by the ratio of the tax-included price of all registered products, the tax-included price, tax amount and base price are calculated based on the discounted tax amount or discounted tax amount apportioned for each product. It may be changed. In addition, the tax-excluded discount amount obtained by subtracting the discounted tax amount from the discount amount or the tax-excluded discount amount obtained by subtracting the discounted tax amount from the discount amount is prorated according to the ratio of the tax-included price of all registered products, and apportioned for each product. It is also possible to change the tax-inclusive price, tax amount and base price based on the tax-excluded discount amount or tax-exclusive discount amount. Needless to say, the apportioning method is not limited to the above embodiment.

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 subtotal key input process which CPU of the same 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 discount key input process which CPU of the 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.

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 ... Receipt.

Claims (10)

Tax-included price acquisition means to acquire the tax-included price of the product entered for sale,
A tax-inclusive price totaling means for summing up the tax-inclusive prices acquired by the above-mentioned tax-inclusive price acquisition means for all products sold and entered as one transaction;
A discount input means for inputting a tax-included discount for the one transaction;
When the tax-included discount amount for the one transaction is input by the discount input means, the tax-included total amount after the tax-included discount is calculated by subtracting the tax-included discount amount from the total tax-included amount obtained by the tax-included price summing means. A discount calculation means,
A discounted total display means for displaying the total amount after tax calculated by the discount calculation 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,
A tax-inclusive price totaling means for summing up the tax-inclusive prices acquired by the above-mentioned tax-inclusive price acquisition means for all products sold and entered as one transaction;
A discount input means for inputting a tax-included discount for the one transaction;
When the tax-included discount amount for the one transaction is input by the discount input means, the tax-included total amount after the tax-included discount is calculated by subtracting the tax-included discount amount from the total tax-included amount obtained by the tax-included price summing means. A discount calculation means,
A discounted tax amount calculation means for calculating a tax amount included in the total tax-included amount after the tax-included discount from the tax-included total amount after tax calculation and the tax rate calculated by the discount calculation means;
A discounted tax amount output means for outputting the tax amount calculated by the discounted tax amount calculation means,
A product sales data processing apparatus characterized by comprising: Further comprising a receipt issuing means for issuing a receipt printed with the details of a product sold and input as one transaction;
The discounted tax amount output means is issued by the receipt issuing means in association with the tax amount calculated by the discounted tax amount calculating means in association with the tax-included total amount after tax calculated by the discount calculating means. 3. The merchandise sales data processing apparatus according to claim 2, wherein the merchandise sales data processing apparatus is printed on a receipt of the transaction. A discount apportioning means for apportioning the tax-included discount for one transaction input by the discount input means for each product according to the ratio of the tax-included price of each product sold and input in the one transaction;
Price-by-product price calculation means for subtracting the tax-included discount amount apportioned for each product by the discount apportioning means from the tax-included price of the corresponding product to calculate an after-discount tax-inclusive price for each product,
A discount-by-product tax amount calculation unit that calculates a tax amount included in the discounted tax-included price for each product from the discounted tax-inclusive price and tax rate calculated for each product by the discounted product price calculation unit; ,
The product sales data processing apparatus according to claim 1, further comprising: Main unit price after tax reduction of each product by subtracting, for each product, the tax amount calculated by the after-discount product tax amount calculation means from the discounted tax-inclusive price calculated by the discounted product price calculation means After-discount product price calculation means for calculating
The product sales data processing device according to claim 4, further comprising: Tax-included price acquisition means to acquire the tax-included price of the product entered for sale,
A tax-inclusive price totaling means for summing up the tax-inclusive prices acquired by the above-mentioned tax-inclusive price acquisition means for all products sold and entered as one transaction;
Discount rate input means for inputting a discount rate for the one transaction;
When a discount rate for the one transaction is input by the discount rate input means, discount calculation means for discounting the tax-included total amount obtained by the tax-included price summing means at the discount rate and calculating a discounted total amount including tax When,
A discounted total display means for displaying the total price including tax after discount calculated by the discount calculation 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,
A tax-inclusive price totaling means for summing up the tax-inclusive prices acquired by the above-mentioned tax-inclusive price acquisition means for all products sold and entered as one transaction;
Discount rate input means for inputting a discount rate for the one transaction;
When a discount rate for the one transaction is input by the discount rate input means, discount calculation means for discounting the tax-included total amount obtained by the tax-included price summing means at the discount rate and calculating a discounted total amount including tax When,
A discounted tax amount calculating means for calculating a tax amount included in the discounted total tax-included amount from the discounted total amount including tax and the tax rate calculated by the discount calculating means;
A discounted tax amount output means for outputting the tax amount calculated by the discounted tax amount calculation means;
A product sales data processing apparatus characterized by comprising: Further comprising a receipt issuing means for issuing a receipt printed with the details of a product sold and input as one transaction;
The discounted tax amount output means associates the tax amount calculated by the discounted tax amount calculation means with the discounted tax-included total amount calculated by the discount calculation means, on a receipt of the transaction issued by the receipt issuing means. 8. The merchandise sales data processing apparatus according to claim 7, wherein printing is performed. A discount amount calculation means for calculating a discount amount when the total tax-included amount of one transaction obtained by the tax-included price total means is discounted at a discount rate input by the discount rate input means;
Discount amount apportioning means for apportioning the discount amount for one transaction calculated by the discount amount calculating means for each product according to the ratio of the tax-included price of each product sold and input in the one transaction;
Price-by-discount product price calculation means for subtracting the discount amount apportioned for each product by the discount apportioning means from the tax-included price of the corresponding product and calculating a discounted tax-inclusive price for each product;
A discount-by-product tax amount calculation unit that calculates a tax amount included in the discounted tax-included price for each product from the discounted tax-inclusive price and tax rate calculated for each product by the discounted product-by-product price calculation unit;
The product sales data processing device according to claim 6, further comprising: After discount for calculating the discounted main unit price of each product by subtracting the tax amount calculated by the discounted product tax amount calculation unit for each product from the discounted tax-inclusive price calculated by the discounted product price calculation unit Body price calculation means by product,
The product sales data processing apparatus according to claim 9, further comprising:

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