| 摘要 |
PROBLEM TO BE SOLVED: To perform a customer service based on gross margin results and to provide a proper customer service to real regular customers according to the degree of the profit contribution of a store side. SOLUTION: This device is provided with a file of gross margin results by customers and by merchandise for storing and managing a cumulative gross margin amount of each different customer and of each different merchandise. When sales by merchandise data about merchandise purchase by a customer are inputted at the time when accounting is performed, a CPU 1 searches the file of the gross margin results by customers and by merchandise on the basis of an inputted merchandise code and performs a scrupulous discount service that discounts the selling unit cost of each merchandise on the basis of a cumulative gross margin amount by customers and by merchandise. |
