Nesting IF to correct #VALUE! Error Message

[JennE]

My current formula is:

=IF(G4>F4,F4-G4,"0")

and it calculates correctly or displays a "0" if G4 is less than F4.

But I need help finding out what to add to this formula so that it displays
"RNC" if G4 equals RNC.

Please help, didn't sleep last night trying to think of the answer!

 

[Teethless mama]

=IF(G4="RNC","RNC",IF(G4>F4,F4-G4,"0"))

 

[JennE]

YOU ROCK!!!

THANK YOU SO MUCH! Whew, now i can sleep