From my family's perspective:
Admission for my wife and I - $33 bucks a month, 2yr old daughter - free
Gas from SD to ANA - $36
Lunch - We bring our own sandwiches, snacks, etc.
Drinks - We bring those too.
Dinner - Plaza Inn - $28 bucks for 1 kids meal, 1 chicken dinner that my wife and I split, and a coke.
Merchandise - $15 limit.