Meca Concrete purchased a mixer on January 1, 2007, at a cost of $45,000. Straight-line depreciation for 2007 and 2008 was based on an estimated 8-year life and $3,000 estimated residual value. In 2009, Meca revised its estimate and now believes the mixer will have a total service life of only six years, and that the residual value will be only $2,000.
Required:
Compute depreciation for 2009 and 2010.