Last year's balance sheet of Steelo, Inc., showed current assets of $2,915 and current liabilities of $1,415. This year's balance sheet shows current assets of $2,900 and current liabilities of $1,575. The company paid $200 in interest and $100 in dividends during the year. What was the companys change in net working capital, or NWC? (Do not round intermediate calculations. Negative amount should be indicated by a minus sign.)