Deprecation Methods Sorter Company purchased equipment for $110,000 on January 2,2019 . The equipment has an estimated service life of 8 years and an estimated residual value of $11,000. Required: Compute the depreciation expense for 2019 under each of the following methods: 1. Straight-line: $ 2. Sum-of-the-years'-digits: $ 3. Double-declining-balance: $ 4. Depreciation causes the book value of the assets to each period. When an accelerated depreciation method is used, the rate of return each period