4: Property Plant & Equipment (6 Marks)

b) Assume the company now uses the units-of-production method to calculate depreciation expense. Calculate the depreciation expense for the December 31, 2021 year end.e Depreciation Expense at December 31 , 2021 = Calculations: c) Assume now that the company uses the double declining balance method to calculate depreciation. Calculate the net book value at December 31, 2020. Net book value at December 31 , 2020 = Calculations: