These are the answers i have to choose from, can you ?
5n – 300 = 1,500
5n + 300 = 1,500
5n – 200 + 100n = 1,500
5n – 100 – 200n = 1,500

We know that n = number of students attending, that they spent 300 dollars, and they charge 5 dollars per student. We also know that they want 1,500 dollars profit. So, let's use this to write an equation.
5 dollars per student, subtract the cost to run/start the event, is the same as 1,500.
So, your answer is A,
5n - 300 = 1,500.

The third and fourth box.