The 2020 balance sheet of Dugan, Incorporated, showed current assets of $2,915 and current liabilities of $1,415. The 2021 balance sheet showed current assets of $2,900 and current liabilities of $1,575. What was the company's 2021 change in net working capital, or NWC? (A negative answer should be indicated by a minus sign. Do not round intermediate calculations.
(Change in NWC)