Schwert Corp. shows the following information on its 2015 income statement: sales = $215,000; costs = $117,000; other expenses = $6,700; depreciation expense = $18,400; interest expense = $10,000; taxes = $25,370; dividends = $9,500. In addition, you're told that the firm issued $8,100 in new equity during 2015 and redeemed $7,200 in outstanding long-term debt.

a. What is the 2015 operating cash flow?

b. What is the 2015 cash flow to creditors?

c. What is the 2015 cash flow to stockholders?

d. If net fixed assets increased by $28,400 during the year, what was the addition to net working capital (NWC)?