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ABC Manufacturing purchased a machine on 1 July, 2018. The following financial information has been collected to calculate the depreciation at 30 June 2020. Cost $55,000 Expected salvage value $1,500 Estimated useful life in years 17 Estimated useful life in hours 120,000 Hours used in 2020 is: 35,000 Required: Calculate the depreciation expense of the machine in year ended 30 June 2020 using: a. Straight-line method b. Unit of activity method c. Declining balance method using double straight-line rate