Add Extra to Event Ticket

Hey,

Just wondering if this is possible, and how I would go about doing it.

My client has an event with several different ticket types:

• Member
• Public
• Early Bird
• Student
• OAP

When you select the ticket type, and the number of tickets, the attendee form appears as normal, asking to add a name and email address for each attendee.

What my client wants to do is add an extra field (a checkbox) like: Would you like to access the private lounge (+$30). So then when the checkbox is selected, that will get added on to the price of the ticket for that attendee.

Is that possible? From what I can see using the plugin, I can’t find an option to do that, but maybe there is a hook or filter that could do something?

Thanks