Units-of-activity depreciationA tractor acquired at a cost of $760,000 has an estimated residualvalue of $229,000, has an estimated useful life of 30,000 hours,and was operated 4,780 hours during t A tractor acquired at a cost of \\( \\$ 760,000 \\) has an estimated residual value of \\( \\$ 229,000 \\), has an estimated useful life of 30,000 hours, and was operated 4,780 hours during the year. 2 answers