A factory machine was purchased for $388000 on January 1, 2021. It was estimated that it would have a $80000 salvage value at the end of its 5-year useful life. It was also estimated that the machine would be run 32000 hours in the 5 years. The company ran the machine for 4400 actual hours in 2021. If the company uses the units-of-activity method of depreciation, the amount of depreciation expense for 2021 would be $80000. O $84700. O $42350. O $53350