Yawn.
Walmart didn't buy $220 billion last year, you make up figures on the fly and scream at others. Go do some research (as if). But I'll point out your mistakes for you. Page 18.
2004 Net Sales: $256,329,000,000 (Walmarts domestic and foreign and SAMS clubs) Cost of Sales: $198,747,000 (note this includes transportation, inventory and other such related expenses)
Yeah, if I was talking about fiscal 2004, you'd be right.
2005 Walmart Annual Report (PDF)
Page 14.
2005
Net sales: $285,222,000,000
Cost of Sales: $219,793,000,000
Gosh, that looks a lot closer to my $220 billion number than it does to your $198,747,000,000 number. Imagine my surprise.