What does it cost to become a member of at Costco? And how can I become a member?

Costs $60, pay at store.

As stated you sigb up on arrival. I love thid place great deals on bulk items we,got a 4k smart tv there for a great price ladt year . weve aleays had a good experience there and staff has always been friendly anf helpful .

$60 per year. You can get the membership at the store on arrival it takes few minutes to do.