Now Playing: 12-19-12 Marketplace

With six shopping days left until Christmas, we take a look at dynamic pricing. In part two of our series on Michigan’s right-to-work legislation, we look ahead to what’s next for the state’s middle class. General Motors will purchase 200 million shares of stock from the U.S. Treasury in its first step towards a government exit. When acts of violence shake the nation, sales of guns go up -- and the same happens with gun magazine sales. Meanwhile, some schools are looking to beef up security. And Dr. Pepper and other affiliated products are introducing a new soda to attract more male consumers.