1 This app is a very useful tool in the shop that price display of tax not included. 2 This app can calculate a consumption tax. 3 This app does not use the number keys. 4 Please touch the price range and choose a price. 5 You can choose a price from 1yen to 9999yen. 6 When you touch the + icon,add to the total purchase. 7 When you touch the trashbox icon,subtract from the total purchese. 8 When you touch the C icon,the total purchase becomes 0.