An easy-to-use Dutch Treat calculator for Japanese Yen. Since it is in Wizard format (interactive), it can be used simply and immediately. Bills are calculated between Rich, Common, and Poor people at the ratio of 3:2:1, respectively. All calculations are done per 100yen. Simply input the bill amount, number of rich, common, and poor people accordingly (excluding yourself) and calculate with the appropriate button of your category. Since you (the person calculating) adjusts the fraction, you may profit a little (a small perk for doing the calculations). Recalculation is possible at any time, calling for a peaceful and fair splitting of the bill.