Hi all and thanks in advance...
I have the following array formula which is working as intended
=SUMPRODUCT(((CONTACTS!$A$2:$A$5000=A2))/COUNTIFS(CONTACTS!$A$2:$A$5000,CONTACTS!$A$2:$A$5000&"",CONTACTS!$R$2:$R$5000,CONTACTS!$R$2:$R$5000&""))
Problem is it takes way to long to calculate. Is...