Artie Anne purchased a machine at a cost of $18,000. It is expected that the machine will be useful for 4 years after which time they hope to sell it for $1,000. The computer was purchased 31 October 2023. What is the depreciation expense per year? $ What is the annual depreciation rate? How much would the depreciation expense be for the year end 30 June 2024? $ How much would the depreciation expense be for the year end 30 June 2025? $