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 plating's, after which it could be sold for $46,800. Required 1. Calculate each year's depreciation expense for the period 2018-2023 under each of the following depreciation methods: Activity 1 a. Straight-line. Activity 2 b. Units-of-production (Assume annual production in plating's of 140,000: 180,000; 150,000; 125,000; 95,000; and 91,200.) Activity 3 2. Assume that the machine was purchased on September 1, 2018. Calculate each year's depreciation expense for the period 2018-2024 under each of the following depreciation methods: 1. Double-declining balance. 010