Danny owns an electronics outlet in Dallas. In 2021, he paid $690 to register for a four-day course in management in Chicago. Danny paid $710 in airfare. After the course, Danny spent the last day sightseeing. During the trip, Danny paid $128 per night for five nights lodging, $320 per day for meals in restaurants, and $260 per day for a rental car. What amount of these travel expenditures may Danny deduct as business expenses? (Leave no answers blank. Enter zero if applicable.)

Danny may deduct travel expenses of $ _________.