Stellar Company purchased equipment for $221,000 on October 1, 2017. It is estimated that the equipment will have a useful life of 8 years and a salvage value of $12, 480. Estimated production is 40, 100 units and estimated working hours are 19, 700. During 2017, Stellar uses the equipment for 530 hours and the equipment produces 1, 100 units. Compute depreciation expense under each of the following methods. Stellar is on a calendar-year basis ending December 31