Invoice - total for each tax group

Hello, we need help. We need to add some information to invoice. We have 2 tax groups, so we need total for each of them. Best way, how to understand, here is the picture showing current situation.

https://www.dropbox.com/s/wju5ntb9usyp7 ... aktura.jpg

Red - what is
Green - what need

any help/code would help us a lot!

Thank you

just display the green at the bottom like your image?