Dataset values with visual studio 2008

I need anybody help with this:

I have visual studio 2008
I have two different datasets that take values as “money”. those datasets are in two different forms. I would like to collect each and every value of all different entries o the two datasets, and add them so that I can display the totals in a new form that has textboxes that displays the total of the two different datasets.
How do I go about doing so?