Solution
For the Mountain View Restuarant
The charge to reserve is $400 the room
And the charge per person is $15
For the other restaurante Valley View we have this
The charge to reserve is $250 the room
And the charge per person is $25
We want to find the total price for 75 students so we have:
Mountain View Restaurant:
400 + 15*75 = 1525$
Valley View
250 + 25*75 = 2125$