Final answer:
To find the after-tax salvage value of the lathe, calculate the tax savings from depreciation and subtract it from the salvage value.
Step-by-step explanation:
To find the after-tax salvage value of the lathe, we need to calculate the tax savings from the depreciation of the machine.
The lathe falls into the MACRS 3-year class life category, so it will be depreciated using the MACRS depreciation schedule.
In year 3, the depreciation expense is $5,000.
Multiplying this by the tax rate of 21% gives us a tax savings of $1,050.
Subtracting this tax savings from the salvage value of $5,000 gives us an after-tax salvage value of $3,950.