How does Tova give Ethan the T-shirt she buys to replace his, and how does he respond?

Tova goes to the Shop-Way to pick up a few groceries, and she takes the replacement T-shirt with her. When she checks out, she places it on the belt nestled among her groceries. As Ethan is checking her out, he picks it up and looks for a UPC code before he realizes that it is a replacement of the shirt she ruined. He tells her she should not have spent so much. She tells him it was important to him. Ethan is impressed that she would buy the shirt on the internet and drive all the way there to get it. He tells her she is "quite a woman" (286).