The following information ($ in millions) comes from a recent annual report of Amazon.com, Inc.: Net sales Total assets End of year balance in cash Total stockholders' equity Gross profit (Sales - cost of Sales) Net increase in cash for the year Operating expenses Net operating cash flow Other income (expense), net $10,724 4,389 1,036 374 2,466 29 2,059 762 (17) Compute Amazon's balance in cash at the beginning of the year. NE $648 O $629 $1.007 O $1.036