1. This calculator is for self-employed owners, simply click on the product names purchased and see the full price. There is no need to type large numbers anymore! 2. While calculating the bill of each customer, the app will automatically record the transaction and information, which eliminates the trouble of handwritten accounting and errors that can happen through handwritten records. 3. Sales records can be reviewed daily, monthly or yearly. The app can also create (graphical) statistics an