"(b) Compute the amount of depreciation for each Years 1 through 3 using the sum-of-years digits depreciation method." "The sum of 1 through 12 = 1+2+3+4+5+6+7+8+9+10+11+12 = 1+12 + 2+11 + 3+10 + 4+9 + 5+8 + 6+7 = (1+12) + (2+11) + (3+10) + (4+9) + (5+8) + (6+7) = (13) + (13) + (13) + (13) + (13) + (13) = 13 X (12/2) = 13 X 6 = 78 the sum of the first year and the last year multiplied by one half of the total number of years. Hint: Since ""Sum-of-Years-Digits"" title contains an ""S"", use salvage value to compute periodic depreciation expense." Cost: Amount Salvage value: Amount Depreciable value: Formula