Comparing three depreciation methods Dexter Industries purchased packaging equipment on January 8 for $72,000. The equipment was expected to have a useful life of three years, or 18,000 operating hours, and a residual value of $4,500. The equipment was used for 7,600 hours during Year 1, 6,000 hours in Year 2, and 4,400 hours in Year 3. Required: 1. Determine the amount of depreciation expense for the three 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 three years by each method. Note: Round the answer for each year to the nearest whole dollar. Depreciation Expense Year Straight-Line Method Units-of-Activity Method Double-Declining-Balance Method Year 1 $fill in the blank 1 $fill in the blank 2 $fill in the blank 3 Year 2 $fill in the blank 4 $fill in the blank 5 $fill in the blank 6 Year 3 $fill in the blank 7 $fill in the blank 8 $fill in the blank 9 Total $fill in the blank 10 $fill in the blank 11 $fill in the blank 12 2. What method yields the highest depreciation expense for Year 1