Bubba Ho-Tep Ltd Reported Net Income of $300 Million for the Most

Bubba Ho-Tep Ltd reported net income of $300 million for the most recent fiscal year. The firm had depreciation expenses of $125 million and capital expenditures of $150 million. Although it had no interest expense, the firm did have an increase in net working capital of $20 million. What is Bubba Ho-Tep's free cash flow?

A) $5 million
B) $170 million
C) $255 million
D) $150 million