Planet Money's story about why is that: http://www.npr.org/sections/money/2014/07/23/334076398/episode-555-why-is-the-milk-in-the-back-of-the-store http://www.n

Planet Money's story about why is that: http://www.npr.org/sections/money/2014/07/23/334076398/episode-555-why-is-the-milk-in-the-back-of-the-store http://www.npr.org/sections/money/2014/07/23/334076398/episo...