A company has the following balance sheet. What is its net operating working capital? Cash $ 10 Accounts payable $ 30 Short-term investments 30 Accruals 10 Accounts receivable 50 Notes payable 50 Inventory 40 Current liabilities 90 Current assets 130 Long-term debt 60 Net fixed assets 100 Common equity 30 Retained earnings 50 Total assets $230 Total liab. & equity $230 Select one: a. $130 b. $100 c. $40 d. $60 e. $230