394 ♦ Chapter 11
10. In 2007, Bauxite Mining Company purchased a bauxite mine for $9,000,000. At the time of
purchase, Bauxite estimated that the mine contained 500,000 tons of bauxite. Bauxite mined and
sold 40,000 tons in 2007 and 85,000 tons in 2008.
Required:
What is the depletion rate per ton?
What amount of depletion should be reported 2007 and 2008?
11. In 2007, Rockpit Mining Company purchased a bauxite mine for $12,000,000. At the time of
purchase, Rockpit estimated that the mine contained 800,000 tons of bauxite. Rockpit mined and
sold 110,000 tons in 2004 and 160,000 tons in 2008.
Required:
What is the depletion rate per ton?
What amount of depletion should be reported 2007 and 2008?
Depletion rate: $15 = $12,000,000 / 800,000
Depletion for 2007: $1,650,000 = 110,000 × $15
Depletion for 2008: $2,400,000 = 160,000 × $15
12. Amalgamated Mining Company originally acquired a copper mine at a cost of $900,000. It was
thought to contain 1,600,000 tons of recoverable ore and that the property would be worth
$100,000 when the ore was gone.
Required:
What is the depletion rate per ton?
Assume that recoveries of ore were made as follows from the mine:
Determine the amount of depletion cost for each year.
a.
Depletion rate: $18 = $9,000,000 / 500,000
b.
Depletion for 2007: $720,000 = 40,000 × $18
Depletion for 2008: $1,530,000 = 85,000 × $18