My clerk let me stack for some reason, don't think he meant to do it, but my receipt came out looking like this (with my comments in the parentheses):
Mario Party 8 -28.85
917038 917/000 -1 @ -13.50
Bonus: 1.35 Promo #8796 (tiered +10% for 2 games off the base value)
Bonus: -11.50 Price Overide (bump up to $25 for eligible games towards a $29.99+ new game)
Bonus: 2.50 Edge Card 10% (off the bumped up value)
Super Mario Bros. New -35.50
917722 917/000 -1 @ -25.00
Bonus: 2.50 Promo #8796 (tiered +10% for 2 games off the base value)
Bonus: -5.00 Price Overide (+25% Power Trades, though I think I got screwed out of $1.25)
Bonus: 3.00 Edge Card 10% (off the bumped up value)
I'm not going to complain about the missing $1.25 because it wasn't suppose to stack in the first place and I got more from them stacking than him messing up the manual override on NSMB (only gave me +20% instead of +25%).
They let me put MP8 on a preorder as opposed to something instock, so I preordered 3D Dot Game Heroes. He made me put NSMB towards either SMG2, RDR, or SC:C, so I did SMG2, but I'm just going to cancel that.
Beautiful day it was.