At the end of the term at college, Jose, talking in the library with his friend Leanne, said, "I'll sell you my business law notes for $25." Leanne agreed and paid him the money. Jose then realized he'd made a mistake in that he had offered his notes when he meant to offer his book. Leanne didn't want the book; she had a book. She wanted the notes. Would Leanne have a cause of action against Jose if he refused to deliver the notes? Decide and explain.