InfoPath Dev

No I haven't.  I'm pretty new at infopath so I've been learning as I go.  If you could explain to me the steps on how to do that it would be a great help.  I'm using infopath 2007. Thanks.

Hi I've build a form with a repeating table which has a dropdown menu with different categories.  What I'm trying to accomplish is to populate a different field with the total amount of hours inputted when that category (training) is selected and omit the other category in the total.   I hope this is clear ...