Required information [The following information applies to the questions displayed below] On January 1,2021 , 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 2021 and 2022 using each of the following methods; 2. Doubie-declining-balance