Hi, I am trying to add up hours worked on specific projects over different sheets and with multiple criteria. For example, I want excel to recognize and add up all of the hours spent with criteria "company" and "project name", over 6 different sheets. Company is listed in all sheets under Column B (B4:B90) and Project name is listed under C (C4:C90), the actual hours to be added are under H4:H90. I have tried using SUMIFS, as well as SUMPRODUCT but have not succeeded. Please help! Thanks