Answer:
$5,320,000
Step-by-step explanation:
the cost per ton = Cost - salvage value/ estimated tons.
= 25,120,000 - 4,000,000 /240,000
= $88 per ton
Tons remaning = 240,000 - 225000
= 15,000 ton
book value of the mine at year-end = (15000 ton x $88) + 4,000,000
= 132000 + 4,000,000
= $5,320,000
Therefore, At year-end, the book value of the mine (cost minus accumulated depletion) is $5,320,000