Travis is a professional landscaper. He provides his clients with a one-year (12-month) warranty for retaining walls he installs. In June of this year, Travis installed a wall for an important client, Sheila. In early November, Sheila informed Travis that the retaining wall had failed. To repair the wall, Travis paid $700 cash for additional stone that he delivered to Sheila's location on November 20 of this year. Travis also offered to pay a mason $800 to repair the wall.