nits-of-activity Depreciation truck acquired at a cost of $430.000 has an estimated residual value of $22,000, has an estimated useful life of 51,000 miles, and was driven 4,600 miles during the year Determine the following if required, mound your answer for he depreciation rate to two decimal places. (a) The depreciable cost (b) The depreciation rate per mile (c) The units-of-activity depreciation for the year