The service member desk is through the exit door, you can't miss it. It's $60 for regular and $120 for executive which gets you 2% back on all your purchases. The membership is worth it if you're into bulk purchasing. Look on YouTube for "the truth about Costco" that will give you good information on what Costco is about.
You have to buy a membership to be able to shop there but if you go with someone that has a membership you can walk around to see what they offer
I am not sure but there a member services desk where you can ask questions that. I know its $50 a year for a basic membership
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