Hogwarts Inc uses the five-year straight-line depreciation method for all equipment purchases.    On January 1, 2015, Hogwarts Inc purchases a piece of equipment for use in their operations for $12,000.     The salvage value for this piece of equipment is $2,000.   On December 31, 2016, Hogwarts sells this piece of equipment to Voldemort Company for $7,500.  The gain on the sale of equipment is?
$1,500
$4,500
$2,500
None of the above