Subtotal in SAP Webi Report

Hi Experts,

I have one characteristics named Tender Item whose values are Y and N. Y denotes tender item and N denotes Normal sales.

I have to show the cloumn in the Webi Report like-

If Item has value Y then show Y else N.

But the point here is that if the item has Material Group(anothe characteristics) = 300, then we have to show this as sample. But we have to denote sample also with N.

then we have to do subtotal on tender item column. Like for example

material     tender item                          Quantity

100               Y                                    100

200               Y                                    100

                    Subtotal                           200

300               N                                    300

400               N                                    500

                    Subtotal                          800

500               N                                   400

600               N                                   200

                    Subtotal(forsample)          600

Can we achieve this SAP Webi report ?

Please advise.