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

	($ millions)
	A		B		C
Net cash flows from operating activities	(320	)	(320	)	340
Net cash used in investing activities	(920	)	(50	)	(110	)
Net cash from financing activities	1,400		250		(260	)
Cash balance at beginning of year	170		170		170

a. Calculate each companys cash balance at the end of the year. (Enter your answers in millions.)