Houston Pumps recently reported $172,500 of sales, $140,500 of operating costs other than depreciation, and $9,250 of depreciation The company had $35,250 of outstanding bonds that carry a 6.75% interest rate, and its federal-plus-state income tax rate was 25%. In order to sustain its operations and thus generate future sales and cash flows, the firm was required to spend $15,250 to buy new fixed assets and to invest $6,850 in net operating working capital. What was the firm's free cash flow? 1 a. $1,860 b. $4,213 c. $1,589 d. $2,286 e. $1,976