Answer:
Depreciation per year $40,000
Explanation:
The computation of the depreciation expense each year, beginning with the third year is shown below:
Purchase cost $500,000
Less residual value -$50,000
Depreciable cost $450,000
Depreciation per year $90,000 ($450,000 ÷ 5 years)
For two years, the depreciation is $180,000
Book value at the end of the 2nd year is $320,000
($500,000 - $180,000)
Depreciation per year $40,000 ($320,000 ÷ 8 years)