| 摘要 |
PROBLEM TO BE SOLVED: To provide a commodity transaction system, a communication device for sales, and a computer program that help a seller and a purchaser to transact commodities at a selling price corresponding to a purchase number when a plurality of purchasers each purchase the same commodities. SOLUTION: A computer (the communication device for sales) 1 receives purchase applications for commodity from external client devices (communication devices for purchase) 6, computes the number of the purchase applications for commodities sets a purchasing cost of the commodities according to the computation result, and sets a selling price of the commodities according to the purchasing cost. |
