Hey, Aren't Bulk Purchases Supposed to be Cheaper?

This morning I was in Walmart and noticed Campbell's Chicken Noodle Soup was on sale for 50 cents. Pretty good price. However, we didn't need any soup. So, I didn't buy any. This afternoon, I was in SamsClub (also owned by Walmart) and one of their middle aisle displays was soup and out of curiosity I glanced at the price. $8.99 for 12 cans of Campbell's Chicken Noodle Soup. Well, that works out to 74.9 cents a can. That means if you buy it in bulk you get charged nearly 50% more than buying individual cans. Ridiculous.

Hmmm, I wonder if I could buy a bunch from Walmart and then go sell it to Sams???