Final answer:
Depreciation for a new plant asset with a 20-year life and salvage value is calculated for 2025 and 2026 using sum-of-the-years'-digits and double-declining-balance methods. First year's depreciation will be prorated for 9 months, and the base for these calculations is the asset's cost minus the salvage value.
Step-by-step explanation:
The student's question involves computing the depreciation of a plant asset using two different methods: the sum-of-the-years'-digits method and the double-declining-balance method. Depreciation for 2025 and 2026 must be calculated for a plant asset with a purchase date of April 1, 2025, a cost of $711,000, a service life of 20 years, and a salvage value of $60,000.
For the sum-of-the-years'-digits method in 2025, since the asset was purchased on April 1, you would only calculate depreciation for 9 months of the year. You must first calculate the total sum of the years' digits for a 20-year life span, which would be 210 (20 + 19 + 18 + ... + 1). The fraction to apply for the first year is 20/210, and for the second year, it is 19/210. The depreciable base is the cost minus the salvage value, which is $711,000 - $60,000 = $651,000.
For the double-declining-balance method, the annual depreciation rate is 2 × (1/20) = 10%. In the first year, depreciation is only for nine months, and in the second year, it is for the full 12 months, with the calculation based on the book value at the beginning of each year. The book value decreases each year after accounting for depreciation.