The following information ($ in millions) comes from a recent annual report of Amazon.com, Inc.:

Net sales $ 10,793 Total assets 4,387 End of year balance in cash 1,203 Total stockholders' equity 495 Gross profit (Sales Cost of Sales) 2,608 Net increase in cash for the year 25 Operating expenses 2,054 Net operating cash flow 642 Other income (expense), net (19 )

Please help me figure out Amazon's balance in cash at the beginning of the year.