he following information ($ in millions) comes from a recent annual report of Amazon.com, Inc.: Net sales $10,894 Total assets 4,472 End of year balance in cash 1,206 Total stockholders' equity 404 Gross profit (Sales - Cost of Sales). 2,606 Net increase in cash for the year 13 Operating expenses 2,065 Net operating cash flow 627 Other income (expense), net (15) Compute Amazon's cost of goods sold