A tour group of 80 people is going to visit. Please design a plan for chartered flight. Fishing boat for 4 people

A four-person fishing boat 100 yuan, each person costs 25 yuan; 8-person speedboat 240, calculated at 30 yuan per person.

If the cost is the least, all fishing boats are used, and 20 fishing boats cost 2000 yuan.

If the speed is the fastest, all speedboats are used. 10 speedboat is 2400 yuan.

There are many specific schemes, as shown below.