Brad's science class is heading to Skylight Observatory on a field trip. The observatory offers a group rate for students that is $4 less per person than the normal cost. There are 27 students in Brad's science class. His teacher called ahead and found that the total cost for the class will be $378. What is the normal cost per person?

Question

Brad's science class is heading to Skylight Observatory on a field trip. The observatory offers a group rate for students that is $4 less per person than the normal cost. There are 27 students in Brad's science class. His teacher called ahead and found that the total cost for the class will be $378. What is the normal cost per person?
$

GPT 3.5 · Answer

Let x be the normal cost per person.
The group rate is x - $4.
The total cost is 27 * (x - $4) = $378.
Thus, x - $4 = $378 / 27 = $14.
Thus, the normal cost per person is x = $14 + $4 = $<<14+4=18>>18. Answer: \boxed{18}.