This is an engineering economy class. I just need a whole equation as on example 7.9.

e termine the cate of retun for the cash flous shoun n the diopram 1 2 8 should buy the machine PROBLEM 7.9 Determine the rate of return for the cash flows shown in the diagram $7000 590 590 590 s200 s200 200 $3000 590 90 590 3000 0-3000-2000( P/A, i,3)( P/F, i,1)-90( P/A, ,3)(P/F, i, 5)+7000(P/F, i, 8) By trial and error For i-5%, $1027.1 and for i-10%, S-325.6