On october 1, 2018, the allegheny corporation purchased machinery for $314,000. the estimated service life of the machinery is 10 years and the estimated residual value is $6,000. the machine is expected to produce 550,000 units during its life. required: calculate depreciation for 2018 and 2019 using each of the following methods. partial-year depreciation is calculated based on the number of months the asset is in service. 1. straight line. 2. sum-of-the-years’-digits. 3. double-declining balance. 4. one hundred fifty percent declining balance. 5. units of production (units produced in 2018, 28,000; units produced in 2019, 43,000).