I bought one of those giant things of goldfish crackers at Target last weekend with three huge packs of fishys, and we have already eaten 2 of them. That dang box was supposed to last us a month! The same thing always seems to happen with cereal, too. I'll buy 4 boxes when it's on sale, and we'll go through them in a week and a half. I don't know how we'll ever be able to afford to feed anyone but ourselves.
Moral of the story: buying things in bulk is not actually cheaper for us. We just consume more food in the same amount of time. I would be frustrated, but, I really like goldfish.