Fairly simple median issue

Thanks.  I think this is close as I'm not getting a formula error, but when I add the measure to the graph, it is blank.  Here is my formula using my table and columns names.  They only issue I see (bold) is your use of [Product ID], I assumed it should be my value column (actual hours), but I've also tried customer and left out columns.  

1 Client Median = MEDIANX (

                                   CALCULATETABLE (

                                               VALUES ( 'Office Comparison'[Actual Hours] ),

                                               FILTER (

                                                        ALLSELECTED ( 'Office Comparison' ),

                                                        'Office Comparison'[Customer] = SELECTED VALUE ( 'Office                                                                         Comparison'[Customer] )

                                                 )

                                 ),

                                 CALCULATE ( SUM ( 'Office Comparison'[Actual Hours] ) )

)