Vaughn Company purchased factory equipment for $633600. Useful hours for the machine are estimated to be 179000. The estimated salvage value is $43000, and the estimated useful life is 8 years. The machine was used for 21000 hours in the first year. The straight-line method will be used for depreciation. What is depreciation expense for the first year if the asset was purchased on January 1? $79200 $68439 $69300 $73825