Danny owns an electronics outlet in Dallas. This year he paid $600 to register for a four-day course in management in Chicago. Danny paid $800 in airfare and $1,000 for five nights' lodging. After the course, Danny spent the last day sightseeing. During the trip, Danny also paid $140 a day for meals, and $80 a day for a rental car. What amount of these travel expenditures may Danny deduct as business expenses?