A machine with a cost of $78,489.00 has an estimated residual value of $4,745.00 and an estimated life of 6 years or 14,921 hours. It is to be depreciated by the units-of-output method. What is the amount of depreciation for the second full year, during which the machine was used 4,028 hours? Do not round your intermediate calculations. O $12,290.67 $21,188.51 $24,581.33 O $19,907.57