Answer:
C. $0.4 million.
Explanation:
Impairment of an asset is the difference between the carry amount (NBV) of the asset and the higher of the value in use or the fair value less cost to sell. The value in use is the estimated future cash flow from the asset.
From the question
Net book value (NBV) = $4.1 million
Estimated future cash flows = $3.7 million
Fair value = $3.1 million
Higher of the value in use or the fair value = $3.7 million
Impairment = $4.1 million - $3.7 million
= $0.4 million