Depreciation by three methods; partial years Layton Company purchased tool sharpening equipment on October 1 for $87,480. The equipment was expected to have a useful life of 3 years or 8,100 operating hours, and a residual value of $2,430. The equipment was used for 1,500 hours during Year 1, 2,800 hours in Year 2, 2,400 hours in Year 3, and 1,400 hours in Year 4. Required: Determine the amount of depreciation expense for the years ended December 31, Year 1, Year 2, Year 3, and Year 4, by (a) the straight-line method, (b) the units-of-activity method, and (c) the double-declining-balance method. Note: FOR DECLINING BALANCE ONLY, round the multiplier to four decimal places. Then round the answer for each year to the nearest whole dollar. a. Straight-line method Year Amount Year 1 $fill in the blank 1 7,087.5 Year 2 $fill in the blank 2 28,350 Year 3 $fill in the blank 3 28,350 Year 4 $fill in the blank 4 21,262.5 b. Units-of-activity method Year Amount Year 1 $fill in the blank 5 15,750 Year 2 $fill in the blank 6 29,400 Year 3 $fill in the blank 7 25,200 Year 4 $fill in the blank 8 14,700 c. Double-declining-balance method Year Amount Year 1 $fill in the blank 9 404.60 Year 2 $fill in the blank 10 47,512.6 Year 3 $fill in the blank 11 16,717.3 Year 4 $fill in the blank 12 4,411.4 Feedback Area