Net sales	$10,711
Total assets	4,363
End of year balance in cash	1,022
Total stockholders' equity	431
Gross profit	2,456
Net increase in cash for the year	9
Operating expenses	2,067
Net operating cash flow	702
Other income (expense), net	(12)

The above information ($ in millions) comes from a recent annual report of Ardvark, Inc.:

Required:

1. Compute Ardvark's total liabilities at the end of the year.
2. Compute Ardvark's cost of goods sold for the year.
3. Compute the income before income tax for Ardvark.