PURPOSE: To execute final settlement without a trouble by transferring a sales total amount and a setting party code, which are stored with a sales total/ installing party code memory means, to a temporarily holding memory means before detachment when an operation to detach the sales total/installing party code memory means in executed.

CONSTITUTION: A sales total/installing party code memory means 9 stores the amount of the sales total and the setting party code at every automatic vending machine, and it can be detached. A temporary holding memory means 14 temporarily holds and stores the sales total amount and the setting party code, which are stored by the sales total/installing party code memory means 9, and it can be detached at well. When the sales total/installing party code memory means 9 is detached, a data transfer means 13 transfers the sales total amount and the setting party code stored into the sales total/installing party code memory means 9 to the temporary holding memory means 14 before the detachment. Thus, the final settlement can be executed without a trouble.