A manufacturing firm purchased a new machine to be used in its production process for $18,000 on January 1,2019 . The firm estimates the machine will have a three year life and has a salvage value of $3,000. The firm also estimates that the machine will produce 9,000 units. The entry to record the purchase of the machine on January 1, 2019 is given below (using A=A sset, CA= Contra-Asset, L=Liability, R=Revenue, E=Expense). Required: record the adjusting entry for depreciation at the end of the first year on December 31, 2019 using the units-of-production method (list debited account first followed by indented credited account as in the above entry). The machine produced 2,800 units during 2019, 3000 units in 2020 and 2200 units in 2021 Required: Calculate the dollar amount of depreciation expense at the end of 2019, 2020, 2021 under both the straight-line method and units-of-production method. Required: record the adjusting entry for depreciation at the end of the first year on December 31, 2019 using the units-of-production method (list debited account first followed by indented credited account as in the above entry). The machine produced 2,800 units during 2019