Answer:
A. $306
Explanation:
The computation of amount of depletion per ton is shown below:-
Depletion per ton = (Acquisition cost + Intangible development cost + Fair value of the obligation - Salvage value) ÷ Tons of coal
= ($1,500,000 + $360,000 + $180,000 - $510,000) ÷ 5,000
= (2,040,000 - $510,000) ÷ 5,000
= $1,530,000 ÷ 5,000
= $306
Therefore for computing the depletion per ton we simply applied the above formula.