DEVICE AND METHOD FOR COMMODITY SALES MANAGEMENT AND COMPUTER-READABLE RECORDING MEDIUM WHERE COMMODITY SALES MANAGEMENT PROGRAM IS RECORDED

摘要

PROBLEM TO BE SOLVED: To carry out a transaction on the basis of the commercial law without giving any loss except the amount equivalent to consumption tax to a store side by providing an adjusting means, which determines a tentative discount amount finally as a tax deduction discount amount by performing a process for an amount-including-tax predicting means tentative retransaction amount, etc. ;SOLUTION: When it is judged that a tentative transaction amount is larger than a subtotal amount (S21), 1 yen is added to a tentative discount amount (S22) and a return to S18 is made so as to predict an amount after tax again. When it is judged that the tentative transaction amount is smaller than the subtotal amount (S21), it is judged successively whether or not a flag is on (S23) and when not, the process moves to S26. When the flat is not on, on the other hand, 1 yen is subtracted from the discount amount (S24) and after the flat is set on (S25, a return to S18 is made so as to predict an amount after tax again. At S26, a tentative discount amount which is finally obtained through this adjusting process is determined as a tax reduction discount amount.;COPYRIGHT: (C)2000,JPO