A plant asset is acquired by a business on January 1, 2005, for $30,000. The asset's estimated residual value is $8,000 and its estimated life is 5 years. Management chooses to use straight-line depreciation. On January 1, 2007, management revises the total useful life to 6 years and the residual value to be zero.
Required:
a. Compute the balance in Accumulated Depreciation on December 31, 2007.