Final answer:
Comparing units-of-output and double-declining-balance depreciation methods for a $30,500 truck driven 10,000 miles in its first year results in $3,000 and $9,600 in depreciation expense respectively. The vast difference is due to the accelerated nature of the double-declining-balance method.
Step-by-step explanation:
M. C. Jones is considering two different methods for depreciating his $30,500 truck for business use - units-of-output and double-declining-balance. Given the truck will have a salvage value of $6,500 after an 80,000-mile usage or a 5-year useful life, the depreciation expense calculations would vary significantly between these methods in the first year, especially if the truck was driven 10,000 miles.
Under the units-of-output method, the depreciation expense is calculated based on the actual use of the truck. If we assume the total mileage is 80,000 miles, then the cost per mile is ($30,500 - $6,500) / 80,000 miles = $0.30 per mile. Since the truck was driven 10,000 miles in the first year, the depreciation expense would be 10,000 miles * $0.30 per mile = $3,000.
Meanwhile, the double-declining-balance method accelerates the depreciation early in the asset's life. This method would take the book value at the beginning of the year ($30,500), subtract the salvage value ($6,500), leaving us with a depreciable base of $24,000. The depreciation rate is 2 / 5 years = 40% per year. Thus, in the first year, the depreciation expense would be 40% * $24,000 = $9,600.
The difference between the two methods is $6,600 ($9,600 - $3,000), which is attributable to the accelerated nature of the double-declining-balance method that front-loads the depreciation expenses compared to the units-of-output method that spreads the expense based on actual usage.