=SI((LIGNE()=MAX((A$5:A$18=A5)*(B$5:B$18=B5)*LIGNE(A$5:A$18)))*(SOMMEPROD((A$5:A$18=A5)*(B$5:B$18=B5);C$5:C$18)>80);SOMMEPROD((A$5:A$18=A5)*(B$5:B$18=B5);C$5:C$18);"")
=SI(ET(NB.SI.ENS(A$5:A5;A5;B$5:B5;B5)=1;SOMME.SI.ENS(C$5:C$18;A$5:A$18;A5;B$5:B$18;B5)>80);SOMME.SI.ENS(C$5:C$18;A$5:A$18;A5;B$5:B$18;B5);"")