Impaired Goodwill and Amortization of Patent On December 31, it was estimated that goodwill of $24,500 was impaired. In addition, a patent with an estimated useful economic life of 12 years was acquired for $100,800 on April 1. b. Journalize the adjusting entry on December 31 for the amortization of the patent rights. Do not round intermediate calculations. Depreciation by Two Methods A Kubota tractor acquired on January 9 at a cost of $81,000 has an estimated useful life of ten years. Assuming that it will have no residual value. 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