Required information [The following information applies to the questions displayed below.] On January 1, 2021, the Allegheny Corporation purchased equipment for $355,000. The estimated service life of the equipment is 10 years and the estimated residual value is $25,000. The equipment is expected to produce 300,000 units during its life. Required: Calculate depreciation for 2021 and 2022 using each of the following methods. 1. Sum-of-the-years'-digits (Do not round intermediate calculations. Round final answers to the nearest whole dollar amount.) Year 2021 Depreciation expense $ 15,000 2022 S 58,500