The Skubic family and the Shaw family went on a safari tour in which they drove their own vehicles through the park to view the animals. The cost of the tour was 5 point 2 5 dollars per vehicle plus an additional amount for each person in the vehicle. The Skubic family had 7 people in their vehicle and paid 22 point 7 5 dollars If the Shaw family had 3 people in their vehicle, how much did they pay?