Does he buy en masse, then claim that he ate for $1/day even though he has an inordinate amount of leftovers? I don't understand how he can possibly have 32 box

Does he buy en masse, then claim that he ate for $1/day even though he has an inordinate amount of leftovers? I don't understand how he can possibly have 32 boxes of cereal (among other things) at the end. I've never seen a box for less than a dollar, and already that is over his budget.