Hi All, I'm new here and new to using a Mac, my MBP is about 3 weeks old and I love it and wonder how I ever lived being on Windows all my life. Along with the MBP came a 100$ gift certificate (back to school promotion) to use in the mac app store. I apologize in advance if this is a dumb newbie question, but I've looked it up online and couldn't find any answers. If my remaining balance on my gift certificate is less than the price of an app in the mac app store, can I still purchase the app with the remainder of my gift certificate balance going towards that app, and then paying the difference myself through my Apple ID? Does it let you do this? Thanks in advance..