The Chemours Company recently reported $6,345 of sales, $390 of operating costs other than depreciation, and $317 of depreciation. The company had no amortization charges, it had $4,005 of bonds that carry a 4.62% interest rate, and its federal-plus-state income tax rate was 11.2%. Net income for the year was $608. How much was its net operating profit after taxes (NOPAT)?

The answer is $5.006.54 but how did he get that number?