Concessions-only deal example: Buy 1 popcorn, get 1 free small drink (or pay the difference for a larger size)

In this example, a customer can buy any popcorn item and receive a small drink for free. If the customer wants to pay the amount for upgrading to a large, they can do so.

For example: $1.00 for a medium drink, $2.00 for a large drink.

Screenshot of the Promotion/Discount form: