(16 marks) Wastewater Ltd acquired an item of plant on 1 July 2016 for $3 660 000. When the item of plant was acquired, it was initially assessed as having a life of 10000 hours. During the reporting period ending 30 June 2017 the plant was operated for 3000 hours. At 1 July 2017 the plant had a remaining useful life of 7000 hours. On 1 July 2017 the plant underwent a major upgrade costing $234 600. Management believes that this upgrade will add a further 2000 hours of operating time to the plant's life. During the reporting period ended 30 June 2018 the plant was operated for 4000 hours. On 1 July 2018 the plant underwent a further major upgrade, the cost of which amounted to $344 900, and this added a further 3100 hours' operating time to its life. During the reporting period ending 30 June 2019 the plant was operated for 3800 hours. Required: Prepare all the journal entries that Wastewater Ltd would prepare for the years ending 30 June 2017, 30 June 2018 and 30 June 2019 to account for the acquisition, subsequent expenditure and depreciation on the asset.