Following code logic in the update cart page. This page is the first line of defense as a shopping cart is submitted and/or updated in any way. We had some general cart/invoice rounding logic way at the top of the page. I ended up moving it down lower and even trying to help it do the main page functions before any rounding calculations were done. It got kinda tricky as we were switching between local variables and more global session values on a per user basis. Making progress.