When Lola came home from college for spring break, her mother gave her a credit card. “You can sign my name, but don’t spend more than $100,” she told Lola. Lola went on a buying spree with her friend Joyce and together they bought $575 worth of clothing using the credit card. Now her mother refuses to pay more than $150, stating, “I authorized $100, and $50 is the legal maximum for unauthorized purchases.” The credit card company sues for $575. Who wins?