Because you wouldn’t be buying Kraft Mac and Cheese at a Whole Foods. I’d be surprised if they even sell it.

Also, time. I would rather pay more at Target than wal mart because in my experience it takes longer to check out at Walmart, and god forbid the person paying has a problem with their debit card or coupons or whatever.

And I pay more to shop at Amazon.com so that I don't have to go to Target.