Publishing Inc. recently reported $20,000 of sales, $7,500 of operating costs other than depreciation, and $2,000 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 35%. During the year, the sum of expenditures on fixed assets and the change on net operating working capital that totaled $1,550. These expenditures were necessary for it to sustain operations and generate future sales and cash flows. What was its free cash flow?