On 2015 January 1, Jackson Company purchased equipment for $400,000, and installation and testing costs totalled $40,000.

On 2015 January 1, Jackson Company purchased equipment for $400,000, and installation and testing costs totalled ,000. The equipment has an estimated useful life of 10 years and an estimated salvage value of $40,000. If Jackson uses the straight-line depreciation method, the depreciation expense for 2015 is