That looks like a 25% bonus + 10% Edge/Powerup bonus. If you bought one of those 50% bonus coupons from the Powerup website, you got screwed. Take your receipt back in, along with another copy of that coupon, and see if a manager can fix it for you.
Edit: Note that those 50% coupons only apply if you were trading towards specific games. If you took credit on your card, it wouldn't have worked.
hmm...Calculating what you traded in, with bonuses and everything you should have gotten $106.40.
Did you buy Mortal Kombat or Portal 2 using that coupon? Cause i think that's the reason like DJP519 said earlier.
Yeah, I put it towards Mortal Kombat. I don't think I can get another copy of the coupon as I printed it out at a friend's house, since I didn't have internet over the past week.
EDIT: Just noticed I can print another copy of the coupon, but my damn printer is out of black ink. Fucking hell.