The $2017$ balance sheet of Dream, Incorporated, showed current assets of $$1,390$ and current liabilities of $$820.$ The $2018$ balance sheet showed current assets of $$1,680$ and current liabilities of $$1,040.$ What was the company's $2018$ change in net working capital, or NWC$?$

Multiple Choice

$$510$

$$-180$

$$1,930$

$$70$

$$-510$