Net oper. working capital

6. Beranek Company's balance sheet showed operating current assets of $25,000. Its total current liabilities consisted of $8,500 of accounts payable, $4,500 of 5% short-term notes payable to the bank, and $7,000 of accrued wages and taxes. What was its net operating working capital?

a. $ 5,000

b. $ 7,500

c. $ 9,500

d. $13,000

e. $16,500