Jon January 5, 2XX1 Monster Mask Company purchased a machine to produce masks. The machine cost $329,000 and had an estimated salvage value of |$45,040. It was estimated that the machine would last 98,000 production hours or six years. Monster uses the half-month convention. Straight-line Method: Accumulated Year Depreciation Expense Book Value Depreciation 4 5 | T 6 Units of Production (Activity) Method: Machine usage was as follows: Year 1 = 31,600 hours Year 3 = 11,500 hours Year 5 = 8,800 hours Year 2 = 21,400 hours Year 4 = 17,700 hours Year 6 = 6,300 hours Accumulated Year Depreciation Expense Book Value Depreciation Double-Declining Balance Method: Year Depreciation Expense Accumulated Depreciation Book Value 2 L