Use

=-1*SUM(INDIRECT("'"&A1&"'!$O$41:$O$45"))

where A1 holds the sheet name.

--
HTH

Bob Phillips

"kojimm" wrote in message
...
I use the folowing formula in a summary sheet that looks at specific cells
on
other work sheet. =-1*SUM('5-4'!$O$41:$O$45) The worksheets are named
5-1,
5-2, etc. on my summary sheet I have a column that contains the work
sheet
names formatted as text. I tried substituting a cell reference and
various
text functions for '5-4' with and without the ' ' but when I do, Excel
tries
to open a file. How can I make the formula look at the same cells on
different woorksheet without having to edit each formula or pointing to
the
cells each time I ad a new worksheet?