This is an application that calculates public/private water bills. When several households share water without a separate meter, it is difficult to calculate the rate, so we tried to improve this problem.A billing statement is created by summing up the water bill for individual households and the public water bill used by multiple households. Public water charges are apportioned appropriately among households sharing.Provides public/private water supply information storage function, water bill calculation function, and output function of bill calculation result (PDF format).