I have to buy Logic X but I dont want to pay it with my credit card, so I decided Id buy several iTunes Store gift cards (which, as car as Ive read, can be used to non-physical products of the Apple Store as well). My question now is if I buy 2 x 100 or 4 x 50 , do they all get added my account and I can spend them on whatever I want? Or can you only spend 50 on one thing, 50 on another, etc.? Like, youd buy OSX Mavericks for 25 or so, and then youd have 25 left for something else, and you couldnt buy something for 200 with them? I basically would like to know if you can combine them, so I can buy Logic Pro X for 180 in the Mac App Store Thanks!