F.A.Q: Wholesale Club Vs. Grocery Store?

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Today’s frequently asked question is from reader Hanna.  Hanna said that she usually shops at Costco to save money on groceries.  Her question is this:

Do you think it’s better to buy in bulk at stores like Costco or BJ’s or to shop with coupons at a grocery store?

My personal opinion is that I get much better deals at the grocery store but I’d love to hear what others think.  Just a note though, you can use coupons at BJ’s.

Any thoughts?  What do you think of the wholesale clubs versus the grocery store?