A university is trying to determine what price to charge for tickets to football games. at a price of $30 per ticket, attendance averages 40 comma 000 people per game. every decrease of $5 adds 10 comma 000 people to the average number. every person at the game spends an average of $5.00 on concessions. what price per ticket should be charged in order to maximize revenue? how many people will attend at that price?