10.12 On 2 January 2013, Zheng Company purchased a cutting machine to be used in its factory. The machine cost $90,000 (GST exclusive), and its estimated useful life was five years or 500,000 cutting after which it could be sold for $6,000 plus GST. 305 Required Compute the depreciation expense for each year of the machine's useful life under each of the following depreciation methods: (a) Straight-line (b) Diminishing value (200%). (c) Sum of the years' digit (d) Units of production (assume annual production in cuttings of 110,000 for 2013, 100,000 for 2014, 80,000 for 2015, 70,000 for 2016 and 80,000 for 2017)