Hi Ben
Try this:
=IF(ISNA(SUM(A10:A12)),0,SUM(A10:A12))
Dave
OzGrid Business Applications
Ben
If you get the #N/A as a result of a VLOOKUP formula, you might use the MATCH+VLOOKUP combination that has just been produced at this bord (I owe this Malcolm Robertson) instead of much used IF(ISNA(VLOOKUP(...)),0,VLOOKUP(...)).
See: 14398.html
Note. I'm not sure whether ISNUMBER+MATCH+VLOOKUP is cheaper than carrying out ISNA+VLOOKUP+VLOOKUP.
You can also get #N/A's with array-formulas, but that requires of course a different treatment. See Excel's #N/A entry under Contents And Index via Help for other possibilities.
Hope this helps.
Aladin