Suppose that Melissa’s permanent residence and business were located in San Francisco. She attended the conference in San Francisco and paid $250 for the registration fee. She drove 100 miles over the course of three days and paid $90 for parking at the conference hotel. In addition, she spent $150 for breakfast and dinner over the three days of the conference. She bought breakfast on the way to the conference hotel and she bought dinner on her way home each night from the conference. What amount of these costs can Melissa deduct as business expenses?