The equation that represent the incremental ROR analysis of machines X & Y in table below is: Machine X Machine Y Initial cost($) -18767 - 16978 Annual operating cost ($/year) -4650 -5896 Salvage value ($) 3980 3325 Life (years) 3 6 0= 1789 - 1246(/, , 3) 14787(P/F, , 6) + 655(P/F, , 6) =-1789 + 1246(/, , 6) - 13541(P/F, , 3) + 1901(P/F, , 6) 0 = -1789 + 1246(/, , 3) 13541(P/F, , 6) -1901(P/F, , 6) =-1789 - 1246(/, , 6) + 13541(P/F, , 3) -655(P/F, , 6). = -1789 + 1246(/, , 6) - 14787(P/F, , 3) + 655(P/F, , 6)