The equation that represent the incremental ROR analysis of machines X &Y in table below is: Machine X Machine Y Initial cost($) -6890 -4398 Annual operating cost ($/year) -800 -490 Salvage value ($) 1040 760 Life (years) 3 6 0=-2492-310(P/A, AI, 6) - 5850(P/F, AT, 3) + 280(P/F, A1, 6) 00--11288 +1290(P/A, Ai, 3) - 6160(P/F, A1, 6) + 280(P/F, 17, 6) 0= -1789 - 1246(P/A, A1, 6) + 13541(P/F, AI, 3) -655(P/F, AL, 6) 0=-2492 + 310(P/A, A1, 3) - 5850(P/F, A1, 6) - 280(P/F, AI, 6) 0=-11288 - 1290(P/A, A1, 6) - 6160(P/F, A1, 3) + 280(P/F, 11, 6)