The figure, announced by the club on Monday evening, includes all tickets allocated to corporate and Premier Club members.
Initial problems with the online and telephine bookings seem to have been sorted out and Monday saw another busy day at the ticket office as fans snapped up their Wembley tickets.
Tickets for the cup final will be on sale on Tuesday until 3:00pm when attention will turn to the evenings League game against Peterborough.
Wembley sales will resume agains on Wednesday morning. Tickets can continue to be purchased via the phone on 0844 248 5141 and online via the e-ticketing website.