Hi - not sure what Jasonite's question is?
But if you want to promote your repeating fields and show all values, use merge instead of first in the drop down when you select the repeating field for promotion.
You can use a formula in an expression box (calculated value) that uses the sum function to get your grand total - the formula would look like sum(selectyourrepeatingfieldhere)
I don't have an answer as to exporting to Excel. I think from InfoPath Filler you can export.