Sam''s Club would be most efficient in price comparison then Walmart.
No. It wouldn't. He stated that
Their prices are, ounce for ounce, identical to my local grocery store.
Sam's Club is not his local grocery store. And I seriously doubt that any independents out there are undercutting Walmarts prices unless it's a sale.
Cheerios - 2 box pk. - 40.7 oz. $5.78 = 0.142 per oz.
Membership fee $40
Yes, Sam's Club is going to be closer to Costco. But it's Sam's Club. It's a glorified Walmart, with cheap products from China.