Ouyang Inc. sold a piece of machinery for $350,000 on Dec 31, 2013 and reported the following information related to the machinery with a straight-line depreciation method used.

Acquisition cost: $500,000

Acquisition date: 1 Jan, 2013

Residual value: 100,000

Years of useful life: 4

The result of the sale is most likely:

a loss of $25,000

a loss of $50,000

a loss of $150,000

a gain of $50,000

a gain of $250,000