We use, eh, maybe 1300$ a month? Or so. Probably more now with the foster kids, but I haven't checked.
Food is more expensive where we live (than US anyway), and we don't have that many places where you can buy large packs of anything here either. And we'd need to have a car for that too (to get there, and to get the stuff), and we live in a city without any need for a car.
Also, we eat organic when we can, and as much from scratch as possible.
But food is...