Banded rows in a Matrix

Hi,So I've been looking around the internet on how to do Banded rows but they all seem to be for tables and not for a matrix where the cells come from all different places.All I keep seeing are RowNumber mod 2 stuffWell that quite doesn't work for what I need.I have a data set that shows employees, dates, and salesEmployee........Date..............SalesRaul...............2013-12-01.....100Raul...............2013-12-02.....150Raul...............2013-12-07.....350Jose...............2013-12-01.....150Jose...............2013-12-05.....100Jose...............2013-12-06.....50Pedro.............2013-12-04.....100Pedro.............2013-12-07.....400I want a report to look like..............2013-12-01.....2013-12-02.....2013-12-03.....2013-12-04.....2013-12-05.....2013-12-06.....2013-12-07Raul........100................150.......................................................................................................350Jose........150.................................................................................100................50Pedro.......................................................................100............................................................400If I do the row number thing, Raul's data for Dec 1 and Dec 2 would have different row numbers and the Mod would not work.Any suggestions?Thanks