#### Elise Nerlove

##### Board Regular

- Joined
- Dec 17, 2009

- Messages
- 94

I need help with an equation:

If column A = nothing AND column B = nothing, then do nothing. But if a value appears in either column a or b then do the equation: b-a=c

im thinking the equation is: =if(a="",andif(b="","",b-a))

but this is outputting "FALSE" for all rows....any ideas?

Thanks so much for the help!!! greatly appreciated!