Sesame has the versatility to do just about anything you need in the way of creating a database application that can contain data for invoice applications. Creating the printed invoice can be done in a number of ways - each having its advantages and strengths, along with drawbacks, or things that might not appeal to certain users.
I see that you are new to the Sesame Forum. Use the Search feature found near the top of the main screen and search on "Invoice" to find messages that discuss invoices. Also, you may wish to spend quite some time skimming through the many, many messages and replies that are here in the forum, and you probably will find information and answers to your questions.
You can also download the trial version of Sesame and give that a try. Go to:
http://www.lantica.com/Support/downloads.html You will not be able to use the Trial version to "translate" your Q&A databases (see the text on the above page). But the trial version contains the complete documentation (very extensive) in PDF format that you can read to learn more about Sesame!
Please also visit Inside Sesame at
http://www.insidesesame.com This newsletter provides a wealth of expert articles, tips, help info and more concerning Sesame. You can go to
http://www.insidesesame.com/indexes/index_search_form.asp enter Invoice in the Keyword field, and see that the March and April 2004 issues contain a 2-part article about Invoices.