Depreciation expenses using Straight line is $11,000
Depreciation expenses using Double-declining balance is $18,400
Depreciation expenses using Units of production is $12,500
Straight-line method of depreciation is regarded as the simplest form of depreciation
The formulae for this method is {[Purchase value of equipment - Estimated residual value) / Estimated service life}
Formulae for Units-of-production method is (Purchase value of equipment - estimated residual value) / Estimated production units
Units-of-production method = [$115,000 - $5,000] / $220,000 units
Units-of-production method = $110,000 / 220,000 units
Units-of-production method = $0.5 per units
For 2021, Depreciation = Production units in 2021 year * Depreciation per unit
Depreciation = 30,000 units × $0.5
Depreciation = $15,000
For 2022, Depreciation = Production units in 2022 year * Depreciation per unit
Depreciation = 25,000 units * $0.5
Depreciation = $12,500
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