Try the following...
=SUMPRODUCT(SUMIF(INDIRECT("'"&ROW(INDIRECT("1:"&C 1))&"'!A1"),"<"))
...where C1 contains "x".
Hope this helps!
--
Domenic
------------------------------------------------------------------------
Domenic's Profile:
http://www.excelforum.com/member.php...o&userid=10785
View this thread:
http://www.excelforum.com/showthread...hreadid=274189