Sales information device, insertion quantity judging method, and input quantity judging program

摘要

To provide a sales information device, a purchase quantity determination method, and a purchase quantity determination program that can prevent exceeding a determined amount of oil that can be purchased.SOLUTION: A purchase quantity determination method includes referring a frame balance management master according to input contents when inputting sales and journals, comparing "total quantity of registered achievements plus quantity registered this time" with a frame balance quantity to check whether the frame is exceeded by the quantity registered this time, referring the frame balance management master using a sales office code, a supplier code, a product type code, and a sales date when recording direct sales, and referring the frame balance management master using a sales office code, a supplier code, a product type code, and a purchase date when recording purchase.SELECTED DRAWING: Figure 5