Customer-Friendly Checkout without Customer Display

We are a quick service business and don't have a separate Customer Display... instead we rotate our iPad to face the customer so that they can choose a tip and do the majority of checkout on their own. Customers are constantly confused during the checkout process with a credit card because of the interface. After entering a tip they get this screen and don't know what to do next.

The balance amount confuses them because they haven't paid yet so they don't know why the balance is $0, and they don't know to hit Process EMV because most normal people don't actually know what EMV means! Ha. 

The option for a more user-friendly checkout without a customer display would be much appreciated!