“Buy 5, Save $5” promotions are designed to trigger a specific psychological response: the feeling that you are leaving money on the table if you don’t hit the required quantity. Supermarkets bank on the fact that shoppers will add unnecessary items to their carts to reach that threshold. But are these bulk savings actually saving you money, or are they simply forcing you to spend more today on items you might not even need tomorrow? I will examine when you should embrace these deals and when you should ignore them entirely.