Question

I am trying populate H3 with the sum of column E for rows that have the same month and same year as H2. Any ideas would be greatly appreciated!

Answer 1

Here is a working formula without another column:

=SUMPRODUCT((MONTH($A$2:$A$6)=MONTH(H$2))*(YEAR($A$2:$A$6)=YEAR(H$2))*$E$2:$E$6)

And the french version:

=SOMMEPROD(--(MOIS($A$2:$A$6)=MOIS(H$2))*--(ANNEE($A$2:$A$6)=ANNEE(H$2))*$E$2:$E$6)

This is an array formula you have to validate with Ctr + Shift + Enter