[Please Help Me] Solving =SUMIFS or INDEX or MATCH Formula for Data Across (2) Tabs

[ChrisNeedsHelp]

Hi Everyone! Please help me with this.

I attached two images for an example of the formula I need help with. I need the SUM of Hours and Cost to populate by Employee, by Month. The real data tab carries Information thru 2020, so I need the formula consistent to where I can drag over across many columns, not just sum hours and cost columns. I also cannot change the data tab format (Everything that looks to be "Merged and Centered" is and Data Tab is already formulated / structured to how manager wants it).

If you have any suggestions or solutions to how I can get this data to pull thru it would be greatly appreciated !