On January 1, 2004, Mill Corporation purchased for $304,000, equipment having a useful life of ten years and an estimated salvage value of $16,000. Mill has recorded monthly depreciation of the equipment on the straight-line method. On December 31, 2012, the equipment was sold for $56,000. As a result of this sale, Mill should recognize a gain of:
A) $0.
B) $56,000.
C) $27,200.
D) $11,200.