Bartling Energy Systems recently reported $9,250 of sales, $5,750 of operating costs other than depreciation, and $1,000 of depreciation. The company had no amortization charges, it had $3,200 of outstanding bonds that carry a 5% interest rate, and its federal-plus-state income tax rate was 25%. In order to sustain its operations and thus generate sales and cash flows in the future, the firm was required to make $1,250 of capital expenditures on new fixed assets and to invest $300 in net operating working capital. By how much did the firm's net income exceed its free cash flow?

a. $466

b. $446

c. $456

d. $451

e. $461