On 1 January 2019, a company which prepares financial statements to 31 December each

year buys a machine at a cost of 46,300. The machine's useful life is estimated at four

years with a residual value of 6,000. The machine is expected to achieve 50,000 units of

production over its useful life, as follows:

2019 2020 2021 2022

Number of units 10,000 20,000 15,000 5,000

Calculate depreciation charges for each of these four years using:

(a) the straight-line method

(b) the diminishing balance method (at a rate of 40%)

(c) the units of production method.