So here's what I eat in a typical week:

Ground beef ~11.00
marinara sauce ~2.00
cheese ~2.00
chicken ~5.00
eggs ~~2.00
Beef (other than ground) ~4.00
bacon ~2.00?
butter ~2.00
Tea ~2.00

Based on full prices, these amounts are averages - for instance, many weeks I'd be double the cheese but zero eggs. And when I'm in maintenance mode, there will be Atkins type bars in the mix for me, but beef and chicken costs would go down accordingly. Other than what I've listed, I also eat ranch dressing, a little mayo, a teeny bit of ketchup (1/2 tsp on a burger), and will sometimes use olive oil instead of butter to sautee chicken and fry eggs. Since I use jarred sauce, my only spice is salt, of which I use a fair amount. Looks like I'm right in where I thought I'd be between 30 and 35 dollars per week. Probably normally a little bit less, considering beef, cheese, and tea are the only on plan items for which I regularly pay full price. I actually think I spent more when I was eating whole wheat bread and drinking diet coke.

Full disclosure - we typically eat out two meals on the weekends. Lunch on Saturdays is normally Chick-fil-a (grilled chicken club sans bun) and one dinner on Saturday or Sunday (usually cheeseburger or steak).