How to Cut Your Grocery Bill in Half!! Why all the focus on groceries? Outside of mortgages, cars and daycare... It's the next expensive budget item! One where you can easily overspend an extra $500 a month by just throwing junk and convenience foods in your cart at $125 a week!! It all adds up! Get rid of the junk and pop, make fruit waters.. and cut your own fruit and veggies!!!!