PROBLEM TO BE SOLVED: To easily acquire the assumed use amount of a customer in a store.;SOLUTION: This computer is communicatively connected to a member terminal to be operated by a member, and configured to receive information for specifying the member and estimated use amount information including the estimated use amount of the member in a predetermined period in a store from the member terminal, and to store the received estimated use information in a storage device, and to accept the input of the use amount in the predetermined period in the store which has opened in the past concerning the member, and to acquire the estimated use amount in the past predetermined period corresponding to the information for specifying the member from the storage device, and to decide the correction coefficients of the member according to the acquired estimated use amount and the use amount, and to calculate a total value calculated by totaling the estimated use amount included in the estimated use information stored in the storage device by multiply the correction coefficients.;COPYRIGHT: (C)2006,JPO&NCIPI
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