Eighty students are going on a field trip. the total cost includes 2 bus rentals that cost 960 and 10$ per student for lunch. what is the total cost per student?

80 students. 
2 bus rentals - $960.
$10 per student for lunch.

so we do $960 / 80 = which is $12.

so each student pays $12 for a bus rental + $10 for lunch so all together for the whole field trip it's $22.