PLAN-OFFERING DEVICE, LEDGER GENERATOR, PLAN PROVIDING METHOD, LEDGER-GENERATING METHOD, PLAN-PROVIDING PROGRAM, AND LEDGER-GENERATING PROGRAM

摘要

PROBLEM TO BE SOLVED: To provide a ledger-generating system capable of outputting money- saving plans. SOLUTION: When commodities are bought at shop terminals 10, data are transferred to a home server via a provider 12 and a network 11. The data on purchase amounts of money are reflected automatically and updated at the home server 14. When monthly appropriation is inputted to the home server 14, a menu list is generated, based on a registered menu DB and the menus of the previous month; and shopping instructions are outputted in reference to the cumulative purchase information at the shop terminals 10. A user can find out the shops which offered low purchase prices.