3 First Year: he N 1 Second Year: N-1 D-(6-sil 1 + 2 Nth Year: D=(C-5) 1 + 2 + ... + The denominator for each of the rates in the sum-of-the-years method can be calculated with the formula N (N+1) 1 + 2 + ... +N = 2 Finding annual depreciation by the sum-of-the-years Digit Method and (2) the straight line method (SLM). In Example 1, Donald Kolb depreciated his new car from an original cost $12,850 to a salvage value of $3500 over a period of four years. Construct a depreciation schedule for Don's car using the sum-of-years digit method and (b) the straight line method (SLM)