brokaddr - 3:32 am on Mar 14, 2012 (gmt 0)
Found the following post, which seems relative:
However, changing stored dollar amounts (2.9900) for example; isn't possible due to the way the site's software is constructed.
On sum() calls where there isn't additional math involved, the amounts match up perfectly with Excel. The query with additional percentage formulas as I've posted above, have me stumped.