Solution:
The basis of the straight line is a depreciation and amortization process estimate. That is the best way to calculate the loss of value of a capital asset over time also known as direct depreciation.
The straight line basis is determined by dividing by either the number of years it is planned to use the variations between the cost of such an asset and the estimated recovery value.
--- use double-declining value year 1
(1/5) x 2 = 0.40
--- Cost x 40% = 22400
--- 22400 / 0.40 = 56,000
Savage value:
56,000 - 50,400 = 5,600