maker faire 4 ticket($130)

17th Maker Faire weekends tickets(5/175/18)
2 adults ticket(ages 21 and over) + 2 students tickets(ages 1321)
now sells internet $120+$80=$200(if addition tax and fee worth more $220)
but I sells only $130, however must buy 4 tickets

http://www.eventbrite.com/e/maker-faire-bay-area-2014-tickets-9098302267