Why is wal mart selling wireless 360 controllers for 10 bucks less?

Question

http://www.walmart.com/browse/Accessories/Controllers/_/N-4qd1Zaq90ZaqceZ1z0gls9/Ne-2p4a?ic=48_0&ref=125866.220789+500524.4293873225&tab_value=85_All&catNavId=482412&catNavId=482412&path=0%3A2636%3A482412

see

and all of the others are selling it for 50

wal mart is selling it for 40

Answer 1

because wal-mart can sell things for less due to the way that they run their company, and that is on-line, so they don't have to charge as much