Solution :
<u>Method I : SL method</u>
Cost of equipment = $ 500,000
Salvage value = $ 50,000
Expected life = 5 years
Depreciation = 

= 90,000
Therefore, the
is $ 90,000 using the SL method.
<u>Method II : DDB method</u>
Cost of equipment = $ 500,000
Expected life = 5 years
So, calculating the
at the end of the year 1 is :
Depreciation = 

= $ 200,000
So the book value at the end of the year 1 = $ 500,000 - $ 200,000
= $ 300,000
Now calculating the
at the end of the year 2 is :
Depreciation = 

= $ 120,000
Therefore, the
value is $ 120,000 using the DDB method.
<u>Method III : 150% DB method</u>
Cost of equipment = $ 500,000
Expected life = 5 years
So, calculating the depreciation in year 1 is :
Depreciation = 

= $ 150,000
So the book value at the end of the year 1 = $ 500,000 - $ 150,000
= $ 350,000
Now calculating the depreciation in year 2 is :
Depreciation = 

= $ 105,000
Therefore, the
value is $ 105,000 using the 150% DB method.