user input selection based on Keyfigure

Hi All,

Need your inputs to the below situation.

We have a report which calculates the difference between processing date and issued date. These dates are calculated in BEx as below.

Processing date =  Date where status is E0023

Issued Date = Date where status is E0045

Difference in Days = Issued Date - Processing Date

Now, the issue is user wants a selection variable on the " Difference in Days". Based on the user input like 1 day, 2 days etc, the output should be calculated.  Request you to put your thoughts on this.

Regards,