I need some help solving this

If exactly 186 people sign up for a charter ight, Leisure World Travel Agency charges $318/person. However, if more than 186 people sign up for the flight (assume this is the case), then every fare is reduced by $1 times the number of passengers above 186. Determine how many passengers will result in a maximum revenue for the travel agency. Hint: Let x denote the number of passengers above 186. Show that the revenue function R is given by R(x) = (186 + x)(318 x). , , passengers What is the maximum revenue? 15 l What would be the fare per passenger in this case? | , , dollars per passenger