| 摘要 |
According to one embodiment, a purchase file stores, by commodity, as information concerning purchase-desired commodities specified by a specifying unit, at least the numbers of purchase-planned items and purchase-planned amounts of the commodities. A privilege granting unit grants a privilege to the purchase of the purchase-desired commodities when a total of a total number of purchased items of the purchase-desired commodities obtained from a purchase-results storing unit, which stores information concerning commodities already purchased by a customer, and the numbers of purchase-planned items of the same commodities stored in the purchase file or a total of a total amount of purchased items of the purchase-desired commodities obtained from the purchase-results storing unit and purchase-planned amounts of the same commodities stored in the purchase file is equal to or larger than a threshold. A privilege display unit displays information concerning the privilege granted by the privilege granting unit.
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