Did you buy those two extra tickets with the hope of selling them for a profit on ebay? If so, I'm glad you can't shift them
If not...then hey...thats the way it goes. I had to sell a spare ticket for Green day at milton keynes for £10 after paying nearly £35 on it....and that was Green Day!!!
Heres a hint...when you're older don't go buying a house thinking you can sell it for more than its worth, or it will be a bit more than £50 you're losing out on...