I have a set equation that needs to be run on about a thousand different entries. A simplified version of the equation would be =A+B+C-D. The only problem is, "B" is only found in some of the entries. So for the majority of the times the equation is run for the different entries, it works, but when "B" is nonexistent, the equation returns a #N/A value. Is there anyway I can keep the set equation but make it work when B does not exist?