How about
=SUMIF(F18:L18,"<#N/A")-SUMIF(G18,"<#N/A")-SUMIF(J18,"<#N/A")
Note the third argument is not needed since you are summing the same range
as you are testing.
best wishes
--
Bernard Liengme
Microsoft Excel MVP
people.stfx.ca/bliengme
email address: remove uppercase characters

"JAG" wrote in message
...
Does anyone know of an easy way to accomplish this?

In the example below, I do not wish to add the values in columns G18 and
J18.
=SUMIF(F18:L18,"<#N/A",F18:L18)

Thanks in advance for any replies.
Joe