Chapter 9, Problem 9.29E

1.

To determine

Unit-of-Production Method: Under this method of depreciation, the depreciation expense is calculated on the basis of units produced in a year. This method is suitable when a company has fluctuating productive rate. The formula to calculate the depreciation expense under this method is as follows:

$\text{Depreciation per unit = }\frac{\text{Cost}-\text{Residual value}}{\text{Estimated units of useful life}}$

$\text{Depreciation Expense = Depreciation per unit }\times \text{ Usage}$

To Record: the journal entry for depreciation expense in 2018.

2.

To determine

Corporation P’s cost of the new truck.

3.

To determine

To Record: the journal entry for the exchange of old truck with new truck on March 15, 2018.