| 摘要 |
PROBLEM TO BE SOLVED: To give a user a motive for selling back an article of good quality in its early stages by relating the selling and buying of the article as to a managing method for selling and buying an article such as a book. SOLUTION: The selling and buying of articles given original codes specifying the individuals are managed. When an article is sold, the original code given to the article is obtained. According to its code data, the individual of the object article is specified and the selling date is recorded in a database as information regarding the specified article. When an article is bought, the original code given to the article is obtained. Retrieval from a database is performed according to obtained data to specify the selling date of an object article to be bought. The buying price of the article is computed according to the period from the selling date to the buying date and presented to the user. |
