The user arrives at the first screen
He must select if he wishes to pick up the product or to get them delivered to a particular address.

After this
The user can see a clear listing of the available and open stores in his/her area.

Then the user can now click on the desired product
Configure it with particular characteristics, like ingredients, sizes, amount, and special wishes.

Once the user adds the items to the cart
The user can move to the checkout area, where he introduces his final address for delivery. 

Once the user completes the payment
Then the system will place the order and deliver it to the particular address in the given time.