Okay, I screwed this up awhile back, so be careful. You want the RR license, not an airplane license. If it comes out to $55 at the end, then you did it right. I picked the wrong one the first time, and it was $105 (I think). Make sure you look through each scroll-down menu to make sure you're getting the right one.
BTW, I had to write the FCC a letter asking for a refund for the screw up, and they were surprisingly helpful and prompt in sending me a refund check.