U.S. manufacturing and trade inventories rose by 0.6 percent in August to a seasonally adjusted $1.6 trillion, the U.S. Census Bureau said Monday. The report showed manufacturing and trade sales rose 0.5 percent on a seasonally adjusted basis to $1.24 trillion. From July 2011, inventories rose by 5.3 percent while sales rose 3.1 percent from a year earlier. The inventory-to-sales ratio -- reflecting how many months it would take a company to deplete its inventory at the current sales pace -- came in at 1.28. A year earlier, the ratio was 1.26.