Let ROR be i%, then
PW = -8800000 + 450000 * (P/A,i%,5)*(P/F,i%,10) + 50000 *(P/G,i%,5)*(P/F,i%,10) = 0
450000 * (P/A,i%,5)*(P/F,i%,10) + 50000 *(P/G,i%,5)*(P/F,i%,10) = 880000
Dividing by 10000
45* (P/A,i%,5)*(P/F,i%,10) + 5*(P/G,i%,5)*(P/F,i%,10) = 88
using trail and error method
When I = 9%, value of 45* (P/A,i%,5)*(P/F,i%,10) + 5*(P/G,i%,5)*(P/F,i%,10) = 45* 3.889651*0.422411 + 5*7.111048*0.422411 = 88.9553
When I = 10%, value of 45* (P/A,i%,5)*(P/F,i%,10) + 5*(P/G,i%,5)*(P/F,i%,10) = 45* 3.790787*0.385543 + 5*6.861802*0.385543 = 78.9957
using interpolation
I = 9% + (88.9553 - 88) / (88.9553 - 78.9957)*(10%-9%)
I = 9.09% (Approx)
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