
Answer:
Depletion cost per ton = (1590000+365000+178000-508000)/6000
Depletion cost per ton = $270.83
Depletion cost = $270.83*900 tons
Depletion cost = 243,747
Account Titles             Debit     Credit
Depletion Expenses       $243,747
   Accumulated depletion           $243,747