Maria Ochoa receives two new credit cards on May 1. She has solicited one of them from Midtown Department Store, and the other arrives unsolicited from High-Flying Airlines. During the month of May, Ochoa makes numerous credit-card purchases from Midtown Department Store, but she does not use the High-Flying Airlines card. On May 31, a burglar breaks into Ochoa's home and steals both credit cards, along with other items.

Ochoa notifies Midtown Department Store of the theft on June 2, but she fails to notify High-Flying Airlines. Using the Midtown credit card, the burglar makes a $500 purchase on June 1 and a $200 purchase on June 3. The burglar then charges a vacation flight on the High-Flying Airlines card for $1,000 on June 5. Ochoa receives the bills for these charges and refuses to pay them. Discuss Ochoa's liability in these situations.