a museum offers a 2-hour guided group tour. for groups with fewer than 25 people the cost is $9.25 per person; for groups with 25 people or more the cost is $8.50 per person. The 27 people in the 9:00 a.m. tour group each paid $ 9.25 in advance. What is the total refund that the museum owes the 9:00 a.m. group?