Chemtech Ltd purchased machinery costing $135,300 incl. GST. The machinery is expected to have a residual value of $19,800 incl. GST at the end of its useful life of 6 years or 75,000 hours. Required A. Assume the machinery was purchased on 1 January 2019 and that the accounting period ends on 31 December. Calculate the depreciation expense (rounding to two decimal places if necessary) for the years 2019 & 2020 using each of the following depreciation methods: 4 1. Straight-line method B. 2. Sum of the year digit method 3. Diminishing balance method at a rate of 25% per annum Assume the machinery was purchased on 1 April 2020 and that the accounting period ends on 30 June 2020. Calculate the depreciation expense (rounding to two decimal places if necessary) for the year ending June 30 2020 using each of the following depreciation methods, round to the nearest dollar: 1. Straight-line method 2. Diminishing balance method at a rate of 25% per annum 3. Units of production method (assume machinery usage hours were 12,000 during the financial year). A. 1. Straight-line: 2. Sum of year digits: 3. Diminishing balance: B. 1. Straight-line: 2. Diminishing balance: 3. Units-of-production