I am trying to replace the number portion of a cell reference with the
results of another formula. I can't seem to get it to work.

This is the formula I started with:
=SUM(WO!J2:J5679)

But instead of the 5679, I want to use the result of the following formula:

=ROWS(WO!qry_WO)-1

where qry_WO is a named range on the WO sheet.

I can do this using a macro, but would prefer to do it on the worksheet.

Is this even possible?