I spend about 70.00 per week for two people at the store, but that includes other stuff like cleaning supplies/kitchen stuff/bathroom and toiletries.
I really only have access to one store, so I can't shop around.
I could spend less if I were to really study the prices and buy stuff when on sale, but we have a small kitchen with no room for storage or a big freezer. Also, since we have no real debts at this point, I'd rather spend my time doing other stuff.