SUMIF within Parent


I am trying to create sum Month to Date Actuals for all Leadership Development Children that have "EMEA" in Region. I will do a separate formula for JAPAC.

So far I have managed to create the below:

=SUMIF({Sheet - 01 - February Ledger Region EMEA}, FIND("EMEA", @cell) > 0, {Sheet - 01 - February Ledger Month Actuals EMEA})

However it don't know how to limit to the Leadership Development parent. Is anyone able to help?