Robert Parish Corporation purchased a new assembly process on August 1, 2017. The cost of this machine was $117,900. The company have a salvage value of $12,900 at the end of its service life. Its life is estimated 21,000 hours. Year-end is December 31. estimated that the machine would at 5 years, and its working hours are estimated at Instructions Compute the depreciation expense under the following methods. Each of the following should be considered unrelated. (a) Straight-line depreciation for 201:7.
(b) Activity method for 2017, assuming that machine usage was 800 hours.
(c) Sum-of-the-years-digits for 2018.
(d) Double-declining-balance for 2018.