Sun Company ("Sun") is engaged in manufacturing and selling of kettle and its financial year- end date is 31 December. On 1 June 2021, Sun purchased a machine for manufacturing of kettle for $600,000 cash. The machine was expected to be used for 5 years. The residual value was expected to be $50,000. The machine is expected to operate for 11,000 hours in its useful life. The machine operated for 1000 hours in 2021 and 2500 hours in 2022. Required: Calculate the annual depreciation expense of the above machine for the financial year 2021 and 2022 respectively using the following methods: (i) straight-line method (with half-year convention) (ii) double-declining balance method (with half-year convention) (iii) units of output method