It's about a Point of sale app.
I want to read the bar codes and sell my products.
So its a full point of sale app, that includes:
I want that my user be allowed to access management area, while the other user not see that area.
functions: add products, edit products, delete products.
I want the inventory with costing and quantity controls.
Managerial area muhst bring all sales of the day or week, or month.