please explain part d with solution

Volbeat Corp. shows the following information on its 2015 income statement: sales = $244,000; costs = $160,000; other expenses = $7,900; depreciation expense = $14,900; interest expense = $14,500; taxes = $16,345; dividends = $11,500. In addition, you're told that the firm issued $6,000 in new equity during 2015 and redeemed $4,500 in outstanding long-term debt. a. What is the 2015 operating cash flow? (Do not round intermediate calculations.) Operating cash $ 59755 flow b. What is the 2015 cash flow to creditors? (Do not round intermediate calculations.) Cash flow to $ 19000 creditors What is the 2015 cash flow to stockholders? (Do not round intermediate calculations.) c. Cash flow to stockholders $ 5500 d. If net fixed assets increased by $20,000 during the year, what was the addition to NWC? (Do not round intermediate calculations.) Addition to NWC $ 49155