Rottino Company purchased a new machine on October 1, 2017, at a cost of $148,000. The company estimated that the machine will have a salvage value of $13, 600. The machine is expected to be used for 11, 700 working hours during its 4-vear life. Compute the depreciation expense under straight-line method for 2017. (Round answer to 0 decimal places, e.g. 2, 125.) Depreciation expense $ Compute the depreciation expense under units of-activity for 2017, assuming machine usage was 1, 790 hours. (Round answer to 0 decimal places, e.g. 2, 125.) Depreciation expense $ Compute the depreciation expense under declining balance using double the straight line rate for 7017 and 2018. (Round answers to 0 decimal daces, e.g. 2, 125.) Depredation expense $