集中1度90％:=(COST(95)-COST(5))/(COST(100))*100;
集中度90％:(COST(95)-COST(5))/(COST(95)+COST(5))*100 ;
集中度60％:=(COST(65)-COST(5))/(COST(65)+COST(5))*100 ;
集中度30％:=(COST(35)-COST(5))/(COST(35)+COST(5))*100 ;
集中度15％:MA((COST(95)-COST(5))/(COST(95)+COST(5)),30)*100 ;
