Final answer:
The balance of the accumulated depreciation account at the end of year 3 can be calculated using the units-of-production method.
Step-by-step explanation:
The question is related to the depreciation of the delivery truck purchased by Velco at the beginning of year 1.
Under the units-of-production method, the balance of the accumulated depreciation account at the end of year 3 can be calculated based on the number of miles driven by the truck.
Using the formula:
Depreciation Expense = (Cost - Salvage Value) / Total Units of Production
where Total Units of Production = 100,000 miles, and Cost = $60,000 - $10,000 (Salvage Value), we can calculate the depreciation expense for each mile driven. By multiplying the depreciation expense per mile by the total number of miles driven in year 3, the accumulated depreciation at the end of year 3 can be determined.
For example: if the depreciation expense per mile is $0.50 and the truck was driven 30,000 miles in year 3, the accumulated depreciation at the end of year 3 would be $15,000.