Tim accepts a temporary assignment that is 500 miles away from his office. The assignment is expected to last 7 months. Tim spends $7,000 for lodging and transportation and $3,000 for meals during these 7 months. At the end of the 7 months, Tim is notified that the assignment is extended for another 10 months. Tim incurs $13,000 in travel expenses ($4,000 of which is for meals) during months 8 through 17. What qualifies as deductible travel expenses?