Garrison Corporation purchased a depreciable asset for $420,000 on January 1, 2005. The estimated salvage value is $42,000, and the estimated total useful life is 9 years. The straight-line method is used for depreciation. In 2008, Garrison changed its estimates to a useful life of 5 years (from the original acquisition) with a salvage value of $70,000. What is 2008 depreciation expense?