I came up with different answers. From the instructions I read a potential MealDeal to include all of the selected items.
Before Cross-Tabbing I filtered for Food, Side, and Drink only and and then Summarized which gave me 15,549 tickets.
I added another filter to show only tickets with at least 1 sale in each category, i.e.. Meal AND Side AND Drink. That left 11,009 tickets that met the criteria for Meal Deals.
Total qualifying sales were $453,508. Even with different numbers for total tickets and qualifying tickets, the percentage was the same (71%) and the average sale per ticket was $41.19.
I've attached my workflow. Thanks.
Normster