Mandeep writes off his motor vehicles at a rate of $20\%$ by using the straight-line method. In the year of purchase, a full year’s depreciation is charged. On 1 January 2017, Mandeep purchased a motor vehicle for $20000. He then acquired a second motor vehicle on 1 June 2020 for $10000. What amount was charged as depreciation on motor vehicles for the year ended 31 December 2020?
- A$2000
- B$4000
- C$5000
- D$6000