Bramble Company purchased a new machine on October 1, 2020, at a cost of $111,500. The company estimated that the machine will have a salvage value of $11,500. The machine is expected to be used for 10,000 working hours during its 4-year life.Compute the depreciation expense under units-of-activity for 2020, assuming machine usage was 1,870 hours. Compute the depreciation expense under declining-balance using double the straight-line rate for 2020 and 2021.