On january 2, 2019, konrad corporation acquired equipment for $ 800,000. the estimated life of the equipment is 5 years or 31,000 hours. the estimated residual value is $ 25,000. if konrad corporation uses the units of production method of depreciation, what will be the debit to depreciation expense for the year ended december 31, 2020, assuming that during this period, the asset was used 10,000 hours?