=(A1*B1)0

HTH. Best wishes Harald

"Brian" skrev i melding
...
I want to use the IF function where a reserve is calculated using one of
two
different calculations, but not both. I want the cell to give me an error
response if both source calculations are greater than 0 (to show that an
input error was made). I want the cell to give me a calculated amount if
one
of the calculations is used properly. I would like to use as few cells as
possible to accomplish this.