Answer:
The correct option is A,free cash flow is $500 as shown by my calculation below.
Explanation:
The formula for free cash flows to firm is given as:
FCFF=EBIT(1-t)+D&A-change in net working capital-capex
EBIT is earnings before interest and tax
D is depreciation
A is amortization
Capex is capital expenditure
FCFF=3000(1-0.30)+400-2000
FCFF=$500