Calculating in the head is not one of your strengths? Why not using the change calculator for cash payments? Go to [Main menu] > [Settings] > [Payments] to activate or deactivate the calculator.

And this is how you use the change calculator:

1. Tap on [Charge] to enter the shopping cart.
2. Select your cash payment method.
3. Now the change calculator opens: at the top you can see the total amount to be paid.
4. Now type in how much the customer is giving you.
5. You see the amount of the change.
6. Hand it to the customer. ;-)

… or do you prefer a short (german) video?

(German version)