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摘要

PROBLEM TO BE SOLVED: To determine a sales price appropriate for both a purchaser and an offerer in a system for a plurality of purchase-desiring people to make a joint purchase through a network.;SOLUTION: When a purchase-desiring person designates a commodity desired with a purchaser's terminal 10, an order receiving center system 20 transmits a menu with a standard price of the commodity for each delivery data to the purchaser's terminal 10. The purchaser determines the delivery data based on the menu and transmits order quantity to the order receiving center system 20. The order receiving center system 20 obtains the total number of ordered quantity of the commodity in the delivery data including the ordered quantity, and calculates an estimate price based on the total number of ordered quantity, a period from the current date to the delivery date and the standard sales price of the commodity. The purchase-desiring person performs an order placing operation when the estimate price is acceptable. A final purchase price to this order is calculated based on the standard sales price, a period from ordering to the delivery, and the total number of ordered quantity received by order closing time in the delivery date.;COPYRIGHT: (C)2002,JPO