6-11. Which alternative in the table below should be selected when the MARR = 10% per year? The life of each alternative is 10 years. (6.4) Increment considered (A – DN) (B – A) (C – B) (D – C)  Investment cost $900 $600 $1,000 $1,500  (Annual revenues less costs) $150 $126 $170 $150 IRR on  investment cost 10.6% 16.4% ? ? Increment considered (A – DN) (B – A) (C – B) (D – C)  Investment cost $900 $600 $1,000 $1,500  (Annual revenues less costs) $150 $126 $170 $150 IRR on  investment cost 10.6% 16.4% ? ?