Question

A school offered its students an optional field trip. If 15 or fewer students went on the field trip, the charge for each student would be $11.50. If more than 15 students chose to go on the field trip, the charge for each student would be $10.25. 18 students opted to go on the tour, but each pre-paid $11,50. The students agreed to put the extra amount toward dinner on the trip. How much total money will be put toward dinner on the trip?​

Answer 1

$22.50 will be put towards dinner on the trip. They all payed $11.50, but since there were 18 people they only needed to pay $10.25. We take 11.50-10.25=1.25 and then multiply that by 18 to get 22.50.