The following information ($ in millions) comes from a recent annual report of Amazon.com, Inc.: Net sales Total assets $10,859 4,433 End of year balance in cash 1,091 Total stockholders' equity 508 Gross profit (Sales Cost of Sales) 2,566 Net increase in cash for the year 14 Operating expenses 2,061 Net operating cash flow 619 Other income (expense), net (20) Compute Amazon's balance in cash at the beginning of the year. B