Analyzing changes in inventory, Boeing Company, a U.S. airplane manufacturer, reported a balance of $8,105 million in Inventory at the beginning of 2007 and $9,563 million at the end of 2007. Its income statement reported Cost of Products Sold of $45,375 million for 2007. Compute the cost of inventory either purchased or manufactured during 20007. Boeing Company applies U.S GAAP, and reports its results in millions of U.S dollars.