An asset's book value is $36,000 on January 1, 2007. The asset is being depreciated at a rate of $500 per month on the straight-line method. Assuming the asset is sold on July 1, 2008 for $25,000, the company should record:
1. neither a gain nor loss is recognized on this type of transaction.
2. a gain on sale of $2,000.
3. a gain on sale of $1,000.
4. a loss on sale of $2,000.