Shrives Publishing recently reported $12,250 of sales, $4,600 of operating costs other than depreciation, and $1,200 of depreciation. The company had $3.500 of bonds that carry a 6.25% interest rate, and its federal-plus-state income tax rate was 25%. During the year, the firm had expenditures on fixed assets and net operating working capital that totaled $1,650. These expenditures were necessary for it to sustain operations and generate future sales and cash flows. What was its free cash flow? a. $3,187.50 b. $6,037.50 c. $4,387.50 O d. $7,687.50 e. $6,000.00