PROBLEM TO BE SOLVED: To enable a customer to prepare properly against a risk having a limited period by buying an insurance commodity suitable for the kind of the risk as long as an optional insurance period.;SOLUTION: Premium is adjusted by a premium adjustment control part 25 of a server 10 based on the insurance commodity inputted into an insurance commodity input screen 30 from a user terminal 50 by the customer and the insurance period inputted into an insurance period screen 32.;COPYRIGHT: (C)2002,JPO
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