Hi David,

Division by zero is undefined (remember your algebra classes?).

SO:
Code:
=IF(F58==0,0,F58/F61)

should probably be:
Code:
=IF(F61==0,0,F58/F61)

Similarly:
Code:
=IF(F21,F50/F21,0)

should probably be:
Code:
=IF(F21<>0,F50/F21,0)

Make sense?
_________________________
Andrew Bates