Modifier Price into the Base

Adding the Price of a Modifier into the Base Price of its Parent Item

You want a modifier (such as Cheese) to price on the customer's receipt into the main item (Hamburger), and not be shown separately.

Setup-Dining Area-Receipt
Price onto Parent.
Highlight the category if you want to have it roll the price up into the item is modifying on the printed receipt.
Un-highlight the category if you want to NOT have roll the price up into the item is modifying on the printed receipt.
You can do the same under Check Display if you want the check on the screen to behave the same way.

You can also turn this on for the on-screen check display through the same process but using setup-Dining Areas - entry.