One order. Three different answers.
On order 872, Bridal Web Solutions' SalesTax export, its Payments export and its own underlying line data each give a different answer.
This is not two views of a number rounding differently. It is three sources inside one system that do not agree about a single invoice, and no screen in that system surfaces the disagreement. It was found by exporting all three and comparing them, which is a thing an owner can do this afternoon.