About 600/month. I know we could make some cutbacks, but having little kids is expensive. We go to the wholesale store whenever possible since you save some money there. The area we moved to last year is a lot nicer, and that's reflected in the grocery store prices. It sucks.
About $150 of that is on the baby. Once she gets off formula in about 6 months, we should save some money. My son is also allergic to dairy and eggs, so we have to shop for allergen-free foods, which also gets expensive.