First, create a new donation page which will be used to sell tickets to your event. If you create a tracking code while on the Donation settings page, you'll be able to clearly track who has purchased tickets, how many, and how much money you've raised. 

Next, create and configure a new event page. When on Event details, check "Sell tickets" and select the donation page and donation tracking code you just configured. Then click on Advanced under Event details, and specify a tag for RSVPs. Finally, click Tickets to configure your ticket levels.

Later, you will be able to pull a lists or target everyone who RSVP'd for an email blast by using the RSVP tag you specified, and you can get a detailed breakdown of ticket purchases on the Finances page by selecting the tracking code you created. You can print a list of everyone who purchased a ticket to verify people at the door by clicking the RSVP button while editing your event page.

RSVPs will receive both an RSVP confirmation and donation receipt email. You can configure both of these emails on the donation and event autoresponse page respectively.