A company purchased a piece of equipment for $30,000 on January 1, 2013. It estimates a residual value of $3,000 and a useful life of 5 years. It uses the straight-line method of depreciation. On December 31, 2015 (before depreciation is calculated) its fair value is determined to be $15,000 and the estimated costs to sell are estimated to be $2,000. What is the impairment loss?

Select one: a. $2,400 b. $3,200 c. $4,200 d. $6,200