Which increment should be examined first in incremental rate of return analysis, if MARR 12.0 % ? Do-nothing A First cost $8,000 $4,500 $8,000 $6,500 0 Annual 1,474 914 1,594 1,035 benefit Life 10 yrs ROR 13.0% 15.5% 9.5% 15.0% D-A A-C B-C O A-B Which alternatives can be eliminated immediately in the first step of incremental rate of return analysis, if MARR 11.0%? Do-nothing A $6,000 1,084 D $3,000 $7,000 $3,000 1,368 C First cost Annual benefit 598 447 Life 10 yrs ROR 12.5% 14.5% 8.0% 15.0% Donly O Dand A Dand B Dand C