PROBLEM TO BE SOLVED: To efficiently fit into various business forms of a game parlor.SOLUTION: A member management T/C10 includes: a withdrawal condition setting part 15a for setting withdrawal priority order for determining which lending rate is used from among a plurality of lending rates for each belonging lending rate to give priority to withdrawal from a game ball storage account corresponding to the determined lending rate;; a withdrawal condition table 14c for storing withdrawal priority order set by the withdrawal condition setting part 15a; and a withdrawal processing part 15c for performing withdrawal processing from the game ball storage account, on the basis of the withdrawal priority order corresponding to the belonging lending rate stored in the withdrawal condition table 14c.
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