You have gathered this information on a firm: 

$500,000 sales, 

$10,000 cash dividends, 

$300,000 cost of goods sold, 

$20,000 administrative expense, 

$20,000 depreciation expense, 

$40,000 interest expense, 

$40,000 purchase of productive equipment, 

$600 addition to net working no changes in working capital, 

  tax rate of 21%. 

What is the free cash flow?