Hi

What is a simple and easy solution to make posible seling in shops and to get data from this application using web browser ?

Software appilication is important to have: 

barcode san,

 print to tiket /Receipts-cash register 

online /Offline + cache manifest .Continue without any network connectivity.

In my mind is a simple app like Excel or spredshett/forms.

Idee is for onwer of the shop to see data from app and to have control of data sent to server ( info about customers,ID, copy of the tikets/product ,price,discount, points )

i need a litle database/files who have option to read from Excel/Browser

Is posible a simple encryption for seling data ?