Please show effective interest rate and solve without using excel or excel functions.

e of six new techniques, or the current method, can be used to control mildly irritating chemical fume leakage into the surrounding air from a mixing machine. The estimated costs and benefits (in the form of reduced employee health costs) are given below for each method. Assuming that all methods have a intinite life with zero salvage value, determine which one should be selected, if any) using a MARR of 14.4761059% per year compounded semi-annually, and the BC method. Alternatives Installed Cost, S 5000 18000 20000 25000 20000 AOC, $/year 10000 20000 18000 17000 29000 Benefits, S/year 15000 22000 20000 28000 30000 Which B/C ratio are you utilizing? What is the effective interest rate