Depreciation Expense Recognition

Methods: straight line depreciation method, double-declining balance (DDB)
e.g.,
One Company recently purchased a machine at a cost of $9,800. The machine is expected to have a residual value of $2,000 at the end of its useful life in five years. What is the depreciation expense for all five years using two different menthods?

# straight line depreciation method
slde(cost = 9800, rv = 2000, t = 5)

[1] 1560

# double-declining balance (DDB)
ddb(cost = 9800, rv = 2000, t = 5)

     t    ddb
[1,] 1 3920.0
[2,] 2 2352.0
[3,] 3 1411.2
[4,] 4  116.8
[5,] 5    0.0