Thanks for the reply. The SharePoint List column I am totaling is a Text field formatted as Currency. Value in the field is actually created by a Workflow as text, because I ran into problems using a calculated field elsewhere. The actual value is the product of "Hours" X "Rate". Because SharePoint lists do not produce a Subtotal that you can access and use anywhere I have a workflow that adds and accumulates to give me a subtotal. However, if a user entered a wrong amount and wants to go in and reduce the number of hours, I require them to make a negative entry which allows the workflow to adjust the subtotal and keep things orderly. (You can't just edit the hours, because I use the existing Balance as the base to accumulate new entries to, so the original amount is already in the balance, they could just edit the balance, but I don't want to lose the audiit trail). The resulting entry in SharePoint looks like Hours: -1 Rate: 200 Subtotal: (200). This is the same way it appears in the InfoPath Form Repeating Table.
The filtered column would be 200+(200)+200 should equal 200, but the Sum functon comes up with 400. If were coming up with 600 I could imagine that it wasn't recognizing the parantheses or that it is a negative value, but it just seems to ignore the value completely.
Hope this wasn't too scattered or rambling. I agree it should be netting the values as expected.
Thanks,
Bob