I really need your help!
The following formula works:
=IF(F7="NR",R7-T7,IF(F7="OR",R7-T7,IF(F7="PR",R7-T7,IF(F7="SR",R7-T7,””))))
I need to add, though, that if there is nothing (no date) in cell R7, then this cell should be left blank. I have the following formula and it's not working...