Exercise 9-20 Crane Company purchased a new machine on October 1, 2017, at a cost of $91,800. The company estimated that the machine has a salvage value of $7,600. The machine is expected to be used for 69,600 working hours during its 8-year life Compute depreciation using the following methods in the year indicated. Declining-balance using double the straight-line rate for 2017 and 2018. (Round answers to O decimal places, e.g. 125) 2017 2018 Depreciation using the Declining-balance method Calculate the depreciation cost per hour. (Round answer to 2 decimal places, e.g. $1.25) Depreciation cost per hour Units-of-activity for 2017, assuming machine usage was 400 hours. (Round answer to o decimal places, e.g. 125) Depreciation using the Units-of-activity method for 2017s