Answer:
$67,900
Step-by-step explanation:
For computing the depreciation expense for the year 2021 we need to first find out the depreciation expense for 6 years after that the book value which is shown below:
Depreciation expense for 6 years using the straight line method is 
= (Original cost - salvage value) ÷ (estimated useful life) 
= ($880,000 - $82,000) ÷ (10 years) 
= ($798,000) ÷ (10 years) 
= $79.800
In this method, the depreciation is same for all the remaining useful life
This is a one year depreciation 
So for six years, the accumulated depreciation is 
= $79,800 × 6 years
= $478,800
The six years is calculated from Jan 2, 2015 to 2021
Now the book value is 
= Purchase value of the machinery - accumulated depreciation 
= $880,000 - $478,800
= $401,200
And, there is an overhaul expense i.e $187,000
So total cost is 
= $401,200 + $187,000
= $588,200
The salvage value is $45,000
And the remaining life is 8 years 
So, the depreciation expense for 2021 is 
= ($588,200 - $45,000) ÷ 8 years
= $67,900