usu $ Purchase date: Purchase price: Additional expenditures Useful life (years) Total est. output Decommissioning cost Discount rate 2021 output 31-Dec-20 4,000,000 5,000,000 18 2,500,000 2,750,000 5% 115,000 $ Required a) Prepare all journal entries for the years ended December 31, 2020 and 2021. b) The mining operations ceased on December 31, 2034. A total of 2,000,000 ounces were mine A total of 225,000 ounces were mined during the year ended December 31, 2034. Write allje usu $ Purchase date: Purchase price: Additional expenditures Useful life (years) Total est. output Decommissioning cost Discount rate 2021 output 31-Dec-20 4,000,000 5,000,000 18 2,500,000 2,750,000 5% 115,000 $ Required a) Prepare all journal entries for the years ended December 31, 2020 and 2021. b) The mining operations ceased on December 31, 2034. A total of 2,000,000 ounces were mine A total of 225,000 ounces were mined during the year ended December 31, 2034. Write allje