What determines the price of songs on iTunes?

I'm an artist on iTunes, basically the way I see it, it's determined by how popular the record companies/artists assume the song is going to be. Many "popular" artists have their songs as $1.29 because the record demons, I mean companies, know that the music will be purchased no matter what, so why not get the extra cash. It's like a class system. Sorta. Only my theories, either way, the musicians deserve the money, the record companies get the money.

To answer your question, "Money! So they say, is the root of all evil today."