A number of vendors who provides a simple configuration of the retail price decision support system deviation can readily determine the retail price for the small to sell. Determine the retail price support system (1), the entire product record in the product database (4) that the product database (4) that can be integrated search for the product information of all products to distributors who handled based on the input-party vendors a plurality of class distribution means 12, a set retail price coefficient set on the basis of the retail price of the coefficient of each divided class to the input's sales unit 13, a set retail price factor for dividing the class with respect to property the base is composed of a computer having a retail price calculating means 14 for calculating the retail price. Can be assigned an input from the vendor based on the input character attribute setting means (11) for determining the class attribute in the partition means 12.
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