Plenty of retailers claim to care about customers. But Costco actually proves it.

Unlike other retailers, membership fees are a big part of Costco's revenue. For this reason, the company goes out of its way to continuously examine and enhance the member experience.

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Costco's return policy, for example, is one of the most generous in all of retail. With few exceptions, customers can bring back any item at any time for a refund, even if it's been months since the date of purchase.

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Costco also strives to offer members the lowest prices possible. To that end, the company is very particular about what it puts on its shelves.

If Costco can't source an item at a pri

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