Combine KPI Issue

[fahaduddinahmed]

Case
I have two Sales Executive and One sales Manager. Now these two sales executives work under that manager. Just Say Sales Manager’s monthly target is 2 Million. So the monthly target of those executives will be 1 million each. So the expression will be
Executive 1 sales Achievement + Executive 2 sales Achievement = Manager Sales Achievement
So my question is
“ Can this system sum up two KPI’s achievements and resulted to another KPI’s achievement automatically?
if yes then how can i do this?