Concessions-only deal example: Get $1 off popcorn and a drink when purchased together

In this example, if a customer buys a popcorn item and any drink item together, they will get $1.00 off the price of each item.

For example: At this cinema, a small drink is $3.50, a medium drink is $4.50, and a large drink is $5.50; a small popcorn is $4.50, a medium popcorn is $5.50, and a large popcorn is $6.50. If a popcorn and a drink item are bought together, the customer will get a $1.00 discount off each.

Screenshot of the Promotion/Discount form: