Total Row Stylings

The tr.total added a weird blue color. I cleared that out and added a style for the tfoot to (hopefully) make that row stand out. I also noticed this would make 3 "Total" labels, so I added "Gross" and "Net" to the ones in the thead to clarify what they are signifying.
Style for Total Row

Added line to style tfoot. I'm not sure if this is too simple – but it's clean.
Merge pull request #1 from CruGlobal/Total-Row-Tweaks

Total Row Tweaks