Answer:
the amount of depletion expense shown on the Year 3 income statement is $ 12,500,000
Step-by-step explanation:
Depletion Unit Method record the Depletion expense for usage of Assets such as Mines, Quarries and Oil Wells.
Depletion Expense = Cost of Asset/ Expected Total Contents in Units × Number of Units taken in the Period
Year 1
Depletion Expense = $10,500,000 / 50,000 tons × 10,000 tons
= $ 2,100,000
Year 2
Depletion Expense = $10,500,000 / 50,000 tons × 20,000 tons
= $ 4,200,000
Year 3
New Information received : The rights to the surface pit were expected to have a $500,000 salvage value at the end of Year 3
Hint : Adjust the depletion expense as if it happened at beginning of the year
1.Adjust the Cost with the Salvage Value
2.Adjust the Remaining Number of Units
Depletion Expense = $10,500,000 -$500,000/ 50,000 tons - 30000 tons × 25,000 tons
= $ 10,000,000 / 20,000 tons × 25,000 tons
= $ 12,500,000