Answer:
$1700
Step-by-step explanation:
The total number of students are 360 and the best option in selecting large bus or small bus is the one with lowest cost per student.
Large bus cost per student = $300 / 60 students = $5 per student
Small bus cost per student = $200 / 45 students = $4.44 per student
This means that the small bus is the best option.
So by using hit and trail basis,
(45 students * 4 mini buses) + (60 students * 3 Large Buses) = 360 Students
As we have the limit for 7 buses, the above scenario is the best option here and the total cost for 4 mini bus and 3 large buses is as under:
Total Cost = $200 * 4 Mini Buses + $300 * 3 Large Buses
Total Cost = $800 + $900 = $1700