Yes, unless 1. You go you can find a Costco member to go with while you shop. Then you can use your own cash, Visa, or debit card. 2. You can get a member to buy you a Costco gift card. Then you can go by yourself as much as you want until the cash value of the card runs out.
Yes. Though it is a very easy process to become a member.
Yes
Yes, you do need a membership to make purchases
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