Can I combine this coupon with an offer that comes with purchase of Battlefield 3?

I have a coupon for 50% extra credit on trades toward Battlefield 3 and I was wondering if I can combine that with the 30% trade bonus toward Battlefield 3. If I can't, which would be better for trading in games toward Battlefield 3?|||I assume you are talking about Game (AU or UK). Yes you can combine them, i did at Game and got Battlefield 3 Limited Edtion for Pokemon Black, Splitter Cell 3D and COD WaW. It's a great deal.