Industrial Industries' $2023$ balance sheet shows current assets of $$2,100$ and current liabilities of $$1,650.$ Their $2024$ balance sheet shows current assets of $$1,850$ and current liabilities of $$1,400.$ What was the firm's investment in net working capital for $2024?$

$$-$

$$50$

$$450$

$($$$50)$

$$150$