Dexter Industries purchased packaging equipment on January 8 for $303,400. The equipment was expected to have a useful life of four years, or 4,800 operating hours, and a residual value of $25,000. The equipment was used for 1,680 hours during Year 1,1,008 hours in Year 2, 1,344 hours in Year 3 , and 768 hours in Year 4. Required: 1. Determine the amount of depreciation expense for the four years ending December 31 by (a) the straight-line method, (b) the units-of-activity method, and (c) the double-declining-balance method. Also determine the total depreciation expense for the four years by each method. Round the answer for each year to the nearest whole dollar. Depreciation Expense