IROR Homework ENGR-140 WEEK ly MARR = 30%. Using Irur, Show your work and make a recomendation. Both options have useful lives of 3 yrs. A B Draw 3 CFDs to First Cost $100 $140 receive full credit. Cost@ yr 3 $100 $0 10 IROR Homework ENGR-140 WEEK ly MARR = 30%. Using Irur, Show your work and make a recomendation. Both options have useful lives of 3 yrs. A B Draw 3 CFDs to First Cost $100 $140 receive full credit. Cost@ yr 3 $100 $0 10