Wu Systems has the following balance sheet. Assume that all current assets are used in operations. How much net operating working capital does the firm have?

Cash	$ 100		Accounts payable	$ 200
Accounts receivable	650		Accruals	130
Inventory	550		Notes payable	570
Current assets	$ 1,300		Total current liabilities	$ 900
Net fixed assets	$ 1,000		Long-term bonds	60 0
			Total liabilities	$ 1,500
			Common stock	300
			Retained earnings	500
			Common equity	$ 800
Total assets	$ 2,300		Total liab. & equity	$ 2,300