I'd like to calculate my revenues in a given trimester, based on the invoice total and the date it was paid.
Column B - invoices to add up Column E - date paid
Here is my attempt (which comes up with an error):
=sumifs(Paiement!B2:B100; Paiement!E2:E100; "=>01/01/2014", "<01/04/2014")
Any ideas? Sorry if this has been answered already, but I couldn't seem to get formulas in other answers to work when I applied them to my case!