Business report. Handing on control of the worlds biggest economy. As barack obama prepares to say goodbye we look at what hes done for america financial health. The cost of chinas Raw Materials is going up faster than it has for more than five years wait for it its important because it could mean the rest of us the Rest Of The World paying more for the stuff they sell us . Welcome to World Business report. Im aaron heslehurst. Stay where you are i have about nine nine minutes, it is all i am asking for an eye promised to deliver an exciting snapshot of business. There are just a couple of weeks of Barack Obamas presidency remaining and later today he gives his big farewell speech. As well as being commander in chief hes also overseen the worlds biggest economy for the last eight years. But what kind of legacy has he left . Well more than 11 million more jobs have been added with the Unemployment Rate falling from 7. 8 to 4. 7 but what the typical American Family brings home has barely