Customizing Invoice

Customizing Invoice

I was wondering if it was possible if so how to make the following changes to an invoice:

1. Place the City, State and Zip code on the same line
2. Bill to Item I want to leave it as the company name however not to repeat the name twice if I choose to not user the contacts name in the invoice?
3. Increase the text size of the Balance Due and the monies amount?

I look forward to hearing your feed back.