Kristin, try this, =SUM(A:A,B:B)-C:C
--
Paul B
Always backup your data before trying something new
Please post any response to the newsgroups so others can benefit from it
Feedback on answers is always appreciated!
Using Excel 2002 & 2003

"Kristin Drover" <Kristin wrote in message
...
I've tried it with SUM at the beginning, and putting in brackets in
different
places, but it keeps coming up VALUE!

Any suggestions?