P9-3B. Depreciation Methods On January 2, 2018, Javier Company purchased an electroplating machine to help manufacture a part for one of its key products. The machine cost $437,400 and was estimated to have a useful life of six years or 781,200 platings, after which it could be sold for $46,800. Required a. Calculate each year's depreciation expense for the period 2018-2023 under each of the following depreciation methods: 1. 2. Straight-line. Double-declining balance. 3. Units-of-production. (Assume annual production in platings of 140,000; 180,000; 150,000; 125,000; 95,000; and 91,200.) b. Assume that the machine was purchased on September 1, 2018. Calculate each year's deprecia- tion expense for the period 2018-2024 under each of the following depreciation methods: 1. Straight-line. 2. Double-declining balance. ng 454