Chapter 10, Problem 10.19EX

a.

To determine

Depletion: It refers to the process of proportionately distributing the cost of the extracting natural resources such as coal, mines, and petroleum from the earth to the number of units extracted. The following is the formula to calculate the depletion expense:

$\text{Depletion Cost per Unit }=\frac{\text{Cost of the asset }-\text{ Residual value}}{\text{Estimated Number of Units}}$

$\text{Depletion Expense}=\left(\begin{array}{l}\text{Depletion Cost per Unit }\\ \times \text{ Number of units Extracted and Sold}\end{array}\right)$

To determine: the amount of the depletion expense for the current year.

b.

To determine

To journalize: the adjusting entry on December 31 to recognize the depletion expense.