Hartzell Inc. had the following data for 2010, in millions: Net income = $600; after-tax operating income [EBIT (1-T)] = $700; and Total assets = $2,000. Information for 2011 is as follows: Net income = $825; after-tax operating income [EBIT (1-T)] = $1,125; and Total assets = $2,500. How much free cash flow did the firm generate during 2011?
a) 625
b) 494
c) 644
d) 675
E) 481