Answer:
$52
Explanation:
Sebastian spent $120 on the airline ticket and $55 * 4 = $<<55*4=220>>220 on the hotel.
So, he spent a total of $120 + $220 = $<<120+220=340>>340 on the airline ticket and hotel.
He has $600 - $340 = $<<600-340=260>>260 left to spend.
He plans to be on the trip for 5 days, so he can spend $260 / 5 = $<<260/5=52>>52 per day.