Walk through a Costco warehouse and the price tags appear uniform — white rectangular cards with product names, prices, and a series of numbers that most members have never paused to examine carefully. Experienced Costco shoppers read those tags differently. They see not just a price but a communication — a signal about where the product is in its pricing lifecycle, whether it is available on promotion, whether it is about to disappear from the assortment, and whether now is

There are two types of Costco members. The first walks in with general enthusiasm, adds things to the cart that seem like good deals, and leaves with a receipt that is larger than planned and a trunk full of items that may or may not get used before they expire. The second walks in with a plan, reads the price tags correctly, applies a consistent savings-stacking strategy, and leaves with a receipt that accurately reflects a set of genuinely excellent purchases at the lowest