In BA4 I have this: =IF(AX4=0,"",AX4-AQ4)-AU4 is giving me #VALUE! when all
cells are blank. If all cells have data, I get the right answer. AX and AQ
columns are date format, whereas AU is number format. Is that my problem?
Here's one that works, with BA being the answer:

Col. AQ Col. AX Col. AU Col. BA
11/22/2006 12/5/2006 14 -1

Thank you
Connie