rounding negative values
I need help with a calculation, and I'm sure I'm missing something obvious.
I have a calculated field to determine the difference between a custom date field and the project planned completion date:
WEEKDAYDIFF({plannedCompletionDate}, (ADDWEEKDAYS({DE:First Offer Date},-15))).
I included the field in a report and added conditional formatting for it (>=0 [Green]; >=-5 [Yellow]; <-5 [Red]). This works fine.

Thanks.