I took the same grocery list to Walmart and Costco. When it comes to prices and value, I found a clear winner.

Source: Business Insider

I took the same grocery list to Costco and Walmart in search of the best value. Savannah BornI compared prices per ounce for 32 common grocery items on my list at Walmart and Costco. Costco had better prices but Walmart had more variety and no paid membership required to shop there.