Extracts from the financial statements of Phoenix Supply Corporation (in millions) are as follows:

	2014	2013	2012
Net income	$2,410	$2,650
Interest expense	250	275
Tax expense	810	880
Net cash provided by operating activities	2,500	2,750
Total cash inflow for investing activities	750	450
Total cash outflow for investing activities	1,100	650
Total cash inflow for financing activities	600	660
Total cash outflow for financing activities	800	870
Accounts payable (yearend balances)	2,200	2,110	$2,150
Interest payable (yearend balances)	75	79	79
Tax payable (yearend balances)	52	55	52

Cash outflow and inflow for investing activities occurred for the sale and the purchase of equipment. Cash outflow for financing activities includes retirement of common stock of $200 million for 2014 and $220 million for 2013 and the retirement of longterm debt of $400 million for 2014 and $450 million for 2013. All cash inflows for financing activities are from the issuance of additional stock.

From 2013 to 2014, assuming a tax rate of 30%, Phoenix Supply's free cash flow to the firm decreased by:

Group of answer choices

a. $621.

b. $250.

c. $415.