Depreciation by Two Methods A tractor acquired on January 9 at a cost of $306,000 has an estimated useful life of six years. Assume that it will have no residual value. a. Determine the depreciation for each of the first two years by the straight-line method. First Year Second Year 51,000 b. Determine the depreciation for each of the first two years by the double-declining-balance method. Do not round the double-declining balance rate. If required, round your final answer to the nearest dollar. First Year Second Year