CASH REWARD ESTIMATING SERVER, CASH REWARD ESTIMATING METHOD, DISCOUNT ESTIMATING SERVER, DISCOUNT ESTIMATING METHOD, COMPUTER-READABLE RECORDING MEDIUM WITH PROGRAM RECORDED THEREON AND PROGRAM

摘要

PROBLEM TO BE SOLVED: To facilitate adjustment of an application amount in joint ordering by a plurality of purchasers, efficiently secure cash reward and discounts, and make them fairly distributable in regard to an application amount adjusting server corresponding to a custom of returning profits to the purchasers by cash reward and net rates based upon the application amount. SOLUTION: A 'cash reward by book store application quantity' which is a cash reward when the 'book store application quantity' is applied, a 'cash reward estimated amount for bookstore' which is a 'bookstore application quantity' multiplied by a 'cash reward level for bookstore' set by subtracting an intermediary fee from a 'cash reward level by total application quantity' which is a total of each bookstore application quantity, and an 'expected cash reward estimate' which is a 'bookstore estimated application quantity' multiplied by a most advantageous 'next cash reward level for bookstore' are displayed on a cash reward estimation image plane.