Martinez Corporation purchased machinery on January 1, 2017, at a cost of $300,000. The estimated useful life of the machinery is 4 years, with an estimated salvage value at the end of that period of $26,000. The company is considering different depreciation methods that could be used for financial reporting purposes. Prepare separate depreciation schedules for the machinery using the straight-line method, and the declining-balance method using double the straight-line rate. Depreciation expense for 2020 under double balance is adjusted so that ending book value is equal to salvage value