Prices are managed from Sessions & Prices in your registration.
Adding a price
Open Sessions & Prices and find the session you want to change. Choose Add price, select the price type you want to offer — Full, Concession, BankSA, Preview and so on — and enter the amount. Save, and it appears immediately in the list of prices for that session.
If there is no Add price button
Sessions that belong to a price group do not carry their own prices. See "How price groups work" for what to do instead.
Booking fees
The prices you enter are the prices patrons see. Booking fees are added by the ticketing system at checkout and are not part of the amount you enter here.