Adding a parameter field.

BH
Hi,

I have crystal reports in Visual Studio2010, using Ado.net connection.  I have a parameter field called "PrvBln".  I also have a formula field.  I'm trying to add the numeric value of PrvBln to my summary column, but I get a message saying "A number, currency amount, date, time, or date-time is required here."

What am I doing wrong?