on october 1, 2024, the allegheny corporation purchased equipment for $115,000. the estimated service life of the equipment is 10 years and the estimated residual value is $5,000. the equipment is expected to produce 220,000 units during its life. required: calculate depreciation for 2024 and 2025 using each of the following methods. partial-year depreciation is calculated based on the number of months the asset is in service.straight-line.