Joining Costco (NASDAQ: COST) feels like a victory -- like you have already made a step to save money. In reality, a membership to the warehouse club could save you money or it could end up being a waste of money.
To make the most of your membership, you have to understand how the chain works. Yes, it has low prices, but that's only a small piece of how you can maximize your savings by shopping at the chain.
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