Whispering Company purchased equipment for $286,800 on October 1, 2020. It is estimated that the equipment will have a useful life of 8 years and a salvage value of $13,200. Estimated production is 48,000 units and estimated working hours are 20,000. During 2020, Whispering uses the equipment for 550 hours and the equipment produces 1,000 units. Compute depreciation expense under each of the following methods. Whispering is on a calendar-year basis ending December 31. (Round rate per hour and rate per unit to 2 decimal places, e.g. 5.35 and final answers to 0 decimal places, e.g. 45,892.) (a) Straight-line method for 2020 $enter a dollar amount (b) Activity method (units of output) for 2020 $enter a dollar amount (c) Activity method (working hours) for 2020 $enter a dollar amount (d) Sum-of-the-years'-digits method for 2022 $enter a dollar amount (e) Double-declining-balance method for 2021 $enter a dollar amount