Hello Alteryx Community,
I'm trying to figure out a way for Alteryx to total columns between two dates (start date and month end date) similar to column Q below. The start date is never the same so the date range varies on each row. The date headings below run to Jan-23 but in reality they will keep extending further each month. Is anyone able to help me with this please?

Is there a way to format the heading Jan-25 as a date? Alteryx does not appear to be able to do this. I can do this in Excel and perform calculations on the date headings. In Alteryx, it seems that I can only format cells as a date under a heading. Please see my file attached named "community file". It shows my Alteryx output plus the formula that I would like to see in column Q.

Thanks for your support
Sarah