I need help with this problem please.

In its most recent fiscal year, Boba Tea Corp repdrted net income of $300,000,000. Looking at its financial statements, we observe that the firm reported depreciation expenses of $125,000,000 and capital expenditures of $150,000,000. The firm had no debt but did experience an increase in NWC of $20,000,000. What is Boba Tea's free cash flow? Select one: a. $170 million b. $255 million c. $150 million d. $5 million Clear my choice