We've been shopping at Costco for a few years now, and we save money with their executive program as well as their prices.
But I notice that not everything's a bargain there. I compare their cost-per-volume stats that are posted in the store, but I also have to keep the prices at other stores in mind.
Does anyone have any tips, aside from memorizing the prices at other stores?
Don't they also list items online so you don't have to do the math in the store?
