SUM CHARGING METHOD, SYSTEM, AUTHENTICATION CHARGING SERVER, PURCHASE CONTROL TERMINAL, CHARGING UNIT DEVICE, PROGRAM FOR SUM CHARGING AND STORAGE MEDIUM FOR STORING PROGRAM FOR SUM CHARGING

摘要

PROBLEM TO BE SOLVED: To sum the value information of a plurality of media, to pay for a commodity as one charging information, and to prevent periodic service from interrupting by losing the card balance.

SOLUTION: The value information of a plurality of media connected with a charging unit device is summed and charging is performed as the charging information of one transaction. At this time, value information of a plurality of media authenticated is managed. When the money amount of a single medium of the media does not fulfill the charge of the commodity that the user demands, the sum instruction of a plurality of media is put out to the charging unit device.

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