Thiessen Orchards acquired canning equipment at a cost of $172,000 on January 1, 2021. The company estimates that it will use the machine for 8 years or 16,000 machine-hours. It estimates that the machine would have a residual value of $12,000. Thiessen Orchards used the canning equipment for 1,900 and 2,300 machine-hours in 2021 and 2022, respectively. Required: Compute depreciation expense for 2021 and 2022 using the: 1. Straight-line method of depreciation. 2. Double declining balance method of depreciation. 3. Units-of-production method of depreciation.