The 2014 balance sheet of Steelo, Inc., showed current assets of $3,160 and current liabilities of $1,560. The 2015 balance sheet showed current assets of $3,090 and current liabilities of $1,560 What was the company's 2015 change in net working capital, or NWC? (Do not round intermediate calculations. Negative amount should be indicated by a minus sign.) Net working capital