Prezas Company's balance sheet showed total current assets of $5,250, all of which were required in operations. Its current liabilities consisted of $960 of accounts payable, $600 of 6% short-term notes payable to the bank, and $280 of accrued wages and taxes. What was its net operating working capital? a. $4,650 b. $3,410 c. $1,240 d. $1,840 e. $4,010