Hi. Could someone please help me set up this problem? Thanks

In order to pay the cost of feeding the elephant, Mike decides to charge $2 for an elephant ride. At this price, there are 200 people who want to ride. Mike still doesn't raise enough money, so he decides to raise the price per ride. Mike finds that when he increases the price by $0.50, five fewer people want a ride. How much should Mike charge per ride in order to maximize his revenue?