Renfro Industries' Balance Sheet for December 31, 2016, Is as Follows

Renfro Industries' balance sheet for December 31, 2016, is as follows: $\begin{array}{lrlr}\text { Assets (\$ million) }&&\text { Liabilities and Equity }(\$ million) \\\\\text { Cash } & \$ 8,000 & \text { Accounts Payable } & \$ 36,000 \\\text { Marketable Securities } & 4,000 & \text { Notes Payable } & 12,000 \\\text { Accounts Receivable } & 60,000 & \text { Other Current Liabilities } & 32,000 \\\text { Inventories } & 100,000 & \text { Long-term debt } & 80,000\\\text { Plant \& Equipment } & 220,000 & \text { Preferred Stock } & 48,000 \\\text { Less: Depreciation } & 64,000 & \text { Common Stock } & 20,000 \\\text { Net Plant \& Equipment } & 156,000 & \text { Paid-in Surplus } & 40,000 \\& & \text { Retained Earnings } & 60,000\\\text { Total Assets }&\$328,000&\text { Total Claims }&\$328,000\end{array}$ ? What is Renfro's net working capital at the end of 2016?

A) -$8 million
B) $36 million
C) $92 million
D) $172 million