Answer:
B. Double-declining-balance
Explanation:
The computation of the depreciation expense for 2015 is shown below:
a) Straight-line method:
= (Original cost - residual value) ÷ (useful life)
= ($240,000 - $40,000) ÷ (8 years)
= ($200,000) ÷ (4 years)
= $25,000
In this method, the depreciation is same for all the remaining useful life
(b) Double-declining balance method:
First we have to find the depreciation rate which is shown below:
= One ÷ useful life
= 1 ÷ 8
= 12.5%
Now the rate is double So, 25%
In year 2015, the original cost is $240,000, so the depreciation is $60,000 after applying the 25% depreciation rate
(c) Units-of-production method:
= (Original cost - residual value) ÷ (estimated production)
= ($240,000 - $40,000) ÷ (12,000 hours)
= ($200,000) ÷ (12,000 hours)
= $16.67
Now for the 2015 year, it would be
= Production hours in 2015 year × depreciation per hour
= 2,400 × $16.67
= $40,000