I have a new spreadsheet that I need to calculate a due date (column X) based
on the initial appointment date (column Q).(the next appointment would be 90
days after the initial appointment) I want it to ignore blank cells. I have
used the following formula which calculates the info fine, but it adds 90
days to blank cells also and gives me 3/30/1900. Please help
=IF(NOT(ISBLANK($Q2)),F2+90,"")