Chandler Sporting Goods produces baseball and football equipment and lines of clothing. This year the company had cash and marketable securities worth $3.3 million, accounts payables worth $11 million, inventory of $16 million, accounts receivables of $15 million, short-term notes payable worth $3.5 million, other current assets of $1.2 million, and no other current liabilities. What is the company's net working capital?