Equipment Cost = 40000 Equipment Life = 10 Equipment Residual Value = 4000 The formula to calculate Accumulated Depreciation for year 3 Using SUM OF THE YEARS DIGITS method is =SYD(40000 4000 10,1) + SYD{40000,4000,10,2)+ SYD(40000 4000,10.3) =40000 SYD(40000 4000,10,1). SYD(40000 4000,102) SYD(40000 4000 10,3) =SYD(40000 4000. 10.3) 3/10 =SYD(40000 4000,103) * 3