Required information [The following information applies to the questions displayed below.) On January 1, 2021, the Allegheny Corporation purchased equipment for $307,000. The estimated service life of the equipment is 10 years and the estimated residual value is $21,000. The equipment is expected to produce 284,000 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.) Answer is complete but not entirely correct. Year 2021 2022 Depreciation expense $ 13,000 X $ 50,700 X