The members of the city cultural center have decided to put on a play once a night for a week. Their auditorium holds 600 people. By selling​ tickets, the members would like to raise ​$3,300 every night to cover all expenses. Let d represent the number of adult tickets sold at ​$7.50. Let s represent the number of student tickets sold at ​$4.50 each. If all 600 seats are filled for a​ performance, how many of each type of ticket must have been sold for the members to raise exactly ​$3,300​? At one performance there were two times as many student tickets sold as adult tickets. If there were 360 tickets sold at that​ performance, how much below the goal of ​$3,300 did ticket sales​ fall?



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