An investment of 40000 JD and estimated salvage value after 8 years of 17000 JD. The annual revenue is 14000 JD per year and the annual cost is 21000 JD per year. Using a MARR value of 10%. According to the External rate of return method (ERR) method (i') is equal to. Select one: 8 17000+14000(F/P.10%,8) i'3D -1 40000 817000+14000(F/A.10%.8) -1 40000+21000(P/A,10%.8) 8 40000+21000(P/A.10%.8) -1 17000+14000(F/A.10%,8) 17000 -1 40000+21000(P/A.10%.8)