Answer: d. The book value of the mine decreased $573,400 during 2014.
Step-by-step explanation:
Book value of the mine is:
= Cost + Amount spent to make mine ready
= 4,324,000 + 760,000
= $5,084,000
The depreciation for this mine will be done based on the amount of minerals removed per year from the estimated total. It will be based on the depreciable value which is the book value net of the residual value.
In year 2014, depreciation is:
= Proportion removed * (Book value - Residual value)
= 61,000 / 460,000 * (5,084,000 - 760,000)
= $573,400