Quantity Tracking

[Cmax]

I'm looking for a way to properly track the quantity of burgers on the POS. For example if I sell a burger with an extra patty it only counts that i sold one burger. Is there a way to program it when an extra patty is selected that it accounts for 2 sold?

[rcmck]

Is the extra patty a modifier option on a burger item? 

[Cmax]

It is set as a size option right now

[rcmck]

I assume you have more than one burger on the menu as well? 

[Cmax]

We actually only have one burger option