Answer:
b. $ 1.75
Step-by-step explanation:
Computation of depletion per ton
Cost of land $ 6,400,000
Restoration costs $ 1,200,000
Less: Value after restoration $( 600,000)
Depletion cost basis $ 7,000,000
Recoverable reserves 4,000,000 tons
Depletion costs per ton = Depletion cost basis/ Recoverable reserves
$ 7,000,000 / 4,000,000 tons = $ 1.75 per ton
The depletion costs are after considering the restoration costs of the land, and considering the value after restoration.