I'm trying to use a formula to calculate par levels based on a date range. I have a formula that is calculating the date range:

"global numbervar numberofdaysofreport;

Maximum({?Date Range}) - minimum({?Date Range})

and a formula to calculate the par:

({PAR_LEVEL} * Count ({@SDate}, {ITEM}))/{@numberdaysofreport}

The problem I have is when I only enter a date range of 1 day so view other information on the report. How can I edit my formula to that if days of the report is zero to make that value 1.

Any help would be great.

Thanks