The following information ($ in millions) comes from a recent annual report of Amazon.com, Inc.: Net sales $ 10,873 Total assets 4,469 End of year balance in cash 1,023 Total stockholders' equity 418 Gross profit (Sales Cost of Sales) 2,576 Net increase in cash for the year 25 Operating expenses 2,061 Net operating cash flow 771 Other income (expense), net (29) Compute Amazon's cost of goods sold for the year.