Do Not Buy the Bulk Pack Just Because the Unit Price Is Lower

The math on the shelf label looks convincing: the family-size pack of berries or spinach costs less per ounce. But that math only works if you actually eat it all before it spoils, and for perishables that condition matters more than it looks. A cheaper unit price on food that ends up in the trash is a loss with extra steps.

Before buying bulk, be honest about how fast your household actually goes through that item, not how fast you would like to. If the answer is uncertain, buy the smaller pack. Real savings come from finishing what you buy, not from the label.