The statistics related to ticket sales can be found in the Statistics Module. The statistics to both paid and unpaid tickets are displayed:
Free tickets:
Graph: number of tickets issued per day (no cumulative numbers)
Table: number of tickets issued
Paid tickets:
Number of tickets sold per day (no cumulative numbers)
Number of tickets sold per category
Turnover from ticket sales (cumulative)
Turnover per ticket category
Total turnover from ticket sales for this event
You can choose to display all statistics or filter them by entry ticket.
Payouts and costs related to ticket sales can be found in the Ticket Module.