if he drives from phoenix to los angeles, cullumber would need to leave the afternoon of may 31 and would be reimbursed $0.50 per mille. he would need to spend 2 nights in a hotel, the night of may 31 and the night of june 1. he would return to phoenix by car on june 2. the hotel used by the team charges $160 per night. what is the incremental cost of driving over flying?