A magazine salesperson called at Annie's home and offered to sell her a 'package' of 6 magazines at a special 1-year subscription price of $720. Annie thought it was a good deal and gave the salesperson credit card authorization for $60, being the first of the 12 payments under the agreement. The next day, Annie discovered that the price she would be paying was equivalent to the regular news stand price for each issue.

Advise Annie of her rights (if any). Define and explain any legal concept you use.