=SI(OU(A10="";A11="");"";SOMMEPROD((Dates>=$A$2)*(Dates<=$A$3)*(TabloAppel<>"")))
=SI(OU(A10="";A11="");"";SOMMEPROD((Dates>=$A$2)*(Dates<=$A$3)*(ListeNoms<>"")))
=SI(OU(A10="";A11="");"";SOMMEPROD((ListeDates>=A10)*(ListeDates<=A11)*(Présents="x")))