Can you change text on subscription option page?

Hello, how can I edit the text that appears under my subscription option? I am on the sign-up page http://www.rollerderbyathletics.com/puyj-register/?action=registeruser&subscription=1

Under the box with the text about the subscription and the 'subscribe' button (in my case, buy now), it says:
"You will pay : CAD51.00 for 20 days, and then free for 7 days, and then free for 7 days, and then free for 7 days, and then free for 7 days, and then free for 7 days, and then free for 10 days, and then free for 30 days"

This is confusing to regular people. Can I edit this so it just says something like "you will pay a one time charge of $51 for access to the program for X days"?