I strongly second the Frozen Vegetables. Unless you have hours to wash and fresh veggies, frozen is much better.
I don't go to Costco, but I bet they have 5 lb bags of frozen veggies for $1 a pound.
regular ground beef 85%
canned tomatoes -- don't buy regular tomato sauce it's loaded with sugar
Eggs -- but unfortunately, industrial eggs are nearly worthless and the good ones are too expensive
No coke or pepsi, that stuff is expensive. Iced tea mix?
I think the real issue is going to be fat. Butter, coconut oil, olive oil are very expensive. Are there any cheap fats?
5'0" female, 45 years old. Started Primal October 31, 2011, at a skinny fat 111.5 lbs. Low weight: 99.5 lb on a fast. Gained back to 115(!) on SAD chocolate, potato chips, and stress. Currently 111.