A little off topic, but I just thought of this...
I was raised in a Mormon house - which meant we had a room in the basement stocked with food. Enough to last a year in case there was a plague of locusts or whatnot (incidentally, I always wondered how long it would take the house to be raided if a disaster actually happened, but that's another story).
My parents kept a clipboard in the food room with an inventory control list on it. Every can of peas and pound of wheat in the room was counted along with the date of purchase. If you took a mason jar of peaches out for dessert, you were supposed to check off the item on the list and then when inventory was done, the stock would match the tally. Anything that was getting low on the list would be added to the shopping list and then Mom would run out and buy a flat of strawberries and we'd find ourselves making jam or canning or what have you (fruit) or a carload of canned tuna would show up, etc.
It helped that Dad worked for Nabisco, and was good friends with a number of shopkeepers who would sell him stuff wholesale or for pennies if it wouldn't sell in the store.
Anyway, inventory time was fearful in our eyes as kids. We'd lose a whole weekend (usually late summer - right before harvest time) to go in the basement and count cans. The week following inventory, we'd have to use Dad's word-processing typewriter to re-type the whole inventory.
But by the time we were in grade school, we had it figured out though. We would count accurately on things we hated, but mess up on the stuff we loved. If we over-counted, it meant we could sneak in and eat the good stuff (chips, pop, baking chocolate, cookies, etc.) if we under-counted on enough related categories, the parents would rush out to restock, then force a flurry of eating when the already full cookie shelf was overflowing. We also became very adept at picking the lock on the freezer and food room door, and figured out that we could shimmy between the rafters and come into the food room through the drop-ceiling when the parents changed the lock.
Ahhh shopping lists. Even they can be manipulated for good and evil.