HTML table from Screen is different in PDF

hi,

I have the following HTML table:

In HTML (my editor page) it´s like this:

Real HTML page:

And in PDF it´s like this:

As you can see there a some issues:

-> There is a small space (Artikelnummer, Artikelbeschreibung, Steuersatz)
-> On the right side, the text is larger than the table... The € sign is bigger than the table. If you would add a border around the table, you can see this even better...

Here the whole HTML / XHTML code:
https://paste.ofcode.org/35CJVGtWKxmxysnqGPrQg9g

Any idea?