SUMIF for unique entries

I need to do a SUMIFS statement in Google Sheets but am having a hard time not double counting duplicates in the data. For example:

I want to SUMIF the volume of all of matching flavors but only add the volume of each Batch # one time. Ideally this would count which ever volume is highest for the associated Batch # So in this instance if did a SUMIF for 'CLM' I would like to get 13500 as the answer.

I tried different variations with QUERY nested inside a SUM statement as well, but couldn't make it work. Open to any approach including using a helper column.

Thanks for the help!