Create a sales invoice application

- Sales Invoice App version 1.0 is suitable for commercial and professional businesses.

- Users can print the invoice report and save it in Excel or any other format.

- The app includes the store name and optional username and password options.

- A log of customer names and information is available.

- A log of items in the store is available.

- Zoom in and zoom out is saved when exiting the app, depending on the user's screen size.