Use the following income statement and balance sheet information:

$\backslash$table$[[,2018,2017],[$C$.$ Assets,$65,000,110,000],[$Prop PI & Equip,$550,000,375,000],[$C$.$ Li$$b$,110,000,80,000],[$Depr$,85,000,90,000],[$EBIT$,225,000,210,000],[$Interest Exp,$60,000,60,000],[$Taxes$,35,000,40,000]]$

What is the firm's change in net working capital for $2018?$

$$30,000$

$$-75,000$

$$70,000$

$$75,000$