Hot air balloon.

Image source: by Christine

Jen and Kyle own a hot air balloon business. They have two kinds of hot air balloons, one that holds 1515 people and the other holds 3030.

Below is Jen's note on how many trips are booked for the two kinds of hot air balloons for September, October, and November.

15-person in Sep is 5, Oct is 7, and Nov is 4.

30-person in Sep is 20, Oct is 25, and Nov is 18.

Image source: by Christine

How many people in total booked a hot air balloon trip for September, October and November?

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