摘要 |
<p>PROBLEM TO BE SOLVED: To permit a customer to easily learn the buying amount of a used article that he himself has, an appropriate period when the article is given to buying and a balance when the used article is traded in and a new article is to be purchased in the system of the sales of the new article and the buying/sales of the used article. SOLUTION: When the customer purchases a commodity through a store or a non- store sales system 5 (web server), the commodity is automatically registered in a data management system 4 as a possession. The non-store sales system 5 periodically updates the purchase amount of the possession of the customer in the data management system 4 at any time and displays it on a customer home page which can be accessed from a customer terminal 7. When the customer terminal views the catalogue of the commodity which is desired to be purchased in the non-store sales system 5, the balance between the sales cost of the commodity which is desired to be purchased, the purchase amount of the possession of the customer is calculated and it is displayed on the catalogue. The non-store sales system 5 sets the object of a buying reinforcing campaign, automatically extracts the customer having the object and automatically transmits the electronic mail of campaign guide.</p> |