Pinching Pig-Pennies

Recon is hard work! Time to stop in for a snack at the museum's cafe.

After browsing the unusual menu, you notice an out-of-place server drop a note. You don't want to snoop… then you remember you're a professional thief.

A (quite good!) meal later, your waitress brings you the “Sweet Treats” menu. “Why not?”, you think, and decide to order a…

Observations

• The most popular meal of the day (on the main menu) was ordered 3 times.
• Three meals from the main menu were never ordered. One was the Tofu Burger.
• Only two meals from the kids' menu were ordered. The meals not ordered from the kids' menu were also not ordered from the main menu.
• The most popular kids' menu option was also the most popular main menu option.
• Every 15 dollar option was bought exactly once.
• I made sure to indicate anytime someone wanted a substitution with a dot. No kids wanted substitutions.

Orders

• Customer 1 ordered a meal with a substitution. They paid 15 dollars.
• Customer 2 ordered a meal and paid 10 dollars.
• Customers 3 and 4 ordered together. They bought the same thing and asked to add cheese. They paid 20 dollars.
• Customer 5 ordered a 15 dollar meal, and asked for ziti instead of shells.
• Customer 6 ordered a meal and paid 12 dollars.
• Customers 7, 8, and 9 all ordered together. Customer 7 ordered what would become the day's most popular meal. Her kids (customers 8 and 9) both ordered a kids' pizza.
• Customer 10 also bought the day's most popular meal.
• Customers 11 and 12 ordered together. Customer 11 ordered a 15 dollar meal and asked us to hold the anchovy sauce. Customer 12, his son, ordered a kid's hamburger.