Pay-as-you-go charge calculation device, pay-as-you-go charge calculation method, and pay-as-you-go charge calculation program

摘要

PROBLEM TO BE SOLVED: To calculate a pay-as-you-go charge, which is a charge whose amount is determined according to a usage quantity, by a method of adopting a different unit price for each stage of quantity. And provide a pay-as-you-go rate calculation program. SOLUTION: A pay-as-you-go charge calculation device 100 calculates a pay-as-you-go charge, which is a charge whose amount is determined according to a usage quantity. The pay-as-you-go charge calculation device 100 assigns the total usage quantity input on the total input screen, which is a screen for inputting the total usage quantity, to each quantity range in the unit price master, thereby assigning the quantity for each quantity range. A range-based charge calculation means that calculates the charge for each quantity range by multiplying the quantity for each quantity range allocated by the allocation means and the allocation means to the unit price in the unit price master corresponding to the quantity range. It is provided with a pay-as-you-go charge calculation means for calculating a pay-as-you-go charge according to the total usage quantity by accumulating the charges for each quantity range calculated by the charge calculation means for each range. [Selection diagram] Fig. 1