| 摘要 |
PURPOSE:To prevent the dishonesty of an operator by inhibiting the start of registration of sales data until the input of data indicating the number of customers and executing the tax calculation at the end of registration by an individual transaction key in a sales data processor executing tax calculation. CONSTITUTION:When a customer number key is depressed at first in one transaction, a customer number flag is set up in a register F, the initial address (i) of an individual customer number memory 3b is set up in a register (a) and the number of customers registered in a register X is written in an area K(a), displayed and printed out. When the individual section key is depressed, to register each number of customers in each section, whether the customer number flag is set up in the register F or not is detected, and when the customer number flag is not set up, an error is displayed as no input and registration by each section is invalidated. When an input exists, registration by each section is executed. At the end of registration, the amount to be taxed for one customer is calculated from the number of customers in an area K(a) and the amount to be taxed in each customer in an area T(a). |
