Create a PDF version of a Guest Invoice

For corporate guests, we need to issue an Invoice in PDF to collect the payment. We need the email templated of "Receipt/Billing Summary/Invoice" can be save in PDF similar as Rental Agreement. 

Is it not practical simply to "Print to PDF" from your browser?

Is there a way to simply print a guest's receipt? Searching the forum to find this solution...  For example, they want a paper copy of what is still owed.