On 1 July 2016, Golden Company a helmet manufacturer purchased a new Machine for $72,900. It was estimated to have useful life of six year or 300,000 units of pro produced, after which it could be sold for $7,800. Assuming the financial year end is 31 December, you are required to compute depreciation expense for 2018 under each of the following methods
a) Straight line method
b) Sum of the year's digit method
c) Declining balance method
d) Units of production method assuming annual production was 50,000 helmets.