Current Attempt in Progress A factory machine was purchased for $386000 on January 1, 2021. It was estimated that it would have a $79000 salvage value at the end of its 5-year useful life. It was also estimated that the machine would be run 40000 hours in the 5 years. The company ran the machine for 4000 actual hours in 2021. If the company uses the units-of-activity method of depreciation, the amount of depreciation expense for 2021 would be O $79000. $61400. O $38600 O $30700. Save for Later Attempts: 0 of 1 used Submit Answer