Report Bulder 3.0 Using expressions in headers

The Main report contains 2 calculated fields that contain the values from the Type and Team parameter; which are drop down lists that the user selects from.

I would like to display these values in the header on the drill through report.  Is there some way to capture these values and then use them in an expression in the header on the drill through report.  These values only appear on the main report and not on the drill through report.

Something like ="Daily Activity for Team " & Field!Team.Value & " / " Field!Type.Value & " category"

Thanks for your help.  I'm beginning to understand that you can do a lot with expressions but arent sure how to construct them yet.