There is a sample that shows this look at your install directory and navigate to EN\Samples\Forms\Purchase Order\Dynamic Interactive\Forms and look at the purchaseOrder sample. The table that is in there does exactly what you want.
No it doesn't. I want to use combination of each item in each drop down field, it only allows one format and that's it. does anyone know how to do this?
HiddenQuantity.rawValue = xfa.event.newText;
HiddenItemNumber.rawValue = xfa.event.newText;
This will give you the total pricing for the entire selected quantity. If you have multiple rows of dropdowns (quantity and item number) then each row would need it's own set of hidden fields. Hope this helps.