Below are summary cash flow statements for three roughly equal-sized companies.

	($ millions)
	A		B		C
Net cash flows from operating activities	(310)		(310)		320
Net cash used in investing activities	(910)		(40)		(100)
Net cash from financing activities	1,300		230		(250)
Cash balance at beginning of year	160		160		160

Calculate each companys cash balance at the end of the year.