Danny owns an electronics outlet in Dallas. This year he paid $507 to register for a four-day course in management in Chicago. Danny paid $631 in airfare and $197 per night for lodging. After the course, Danny spent the last day sightseeing. During the trip, Danny also paid $143 a day for meals, and $90 a day for a rental car. What amount of these travel-related expenditures may Danny deduct as business expenses?