Change in depreciable life and salvage va1ue. Thompson Financial acquired a computer on January 1, 2006, for $10,000,000. The computer had an estimated useful life of six years and $1,000,000 estimated salvage value. The firm uses the straight-line depreciation method. On January 1, 2008, Thompson Financial discovers that new technologies make it likely that the computer will last only four years in total and that the estimated salvage value will be only $600,000. Compute the amount of depreciation expense for 2008 for this change in depreciable life and salvage value. Assume that the change does not represent an impairment loss.