How can I sell my original sheet music and mp3 recordings online?

I am a music educator and many other music teachers are wanting copies of my music to teach their students. Is there a way to have people buy my materials from the internet? For example...people could buy my materials through PAYPAL, and they'd receive the PDF file sheet music and then a downloaded mp3 recording of the original music?? DOES THIS SOUND WORKABLE?? Help.