Your answer will be 250*p + 1500(P is the variable to represent the amount of people and the 250 dollars for each of them.)
Step-by-step explanation:
For the explanation there really isn't much to say from my end but in order to get this expression I did 250*P because for a random amount of people they will pay 250 dollars each so its basically like saying 250 dollars per person is the cost. And rest assured the 1500 part of the expression doesn't really need an explanation as its right in the question! And as always I hope this answer helped you! :)