The $2020$ balance sheet of Dugan, Incorporated, showed current assets of $$3,135$ and current liabilities of $$1,545.$ The $2021$ balance sheet showed current assets of $$3,100$ and current liabilities of $$1,545.$ 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