Different filters on different columns

Hi

i'am working with SSRS 2008 and my source is OLAP(mdx query)

i created a report like this

the report return me the following data

                              Nbre all Products     Nbre Dell Products             Nbre HP Products

                 Month 1        50                                 50                            50

                 Month  2       100                                100                            100

what i need is doing filter for a specific columns for example for  Nbre Dell Products show me only the number of Dell Products also for Hp Products how can i do it

Thanks