Hi All,

I'm trying to create a report for a summary of supplier purchases by month.  For example: 

Jan-2014

      Acme Widgets  $153.55  (total of all Acme invoices from Jan etc...)

      Smith and Smith $420.69

Feb-2014

      Acme Widgets $142.35

      Smith and Smith $243.88

OpenERP has many reporting options and thus far I've had the most luck with Pentaho, however, I've not been able to get it to group and total my invoices by month. 

Any suggestions?

Thanks,

Nate