1. If 1 15 people take buses, there are at least three buses, and the rent is 50×3= 150 yuan, 44× 3-115 =17 seats.

2. If 1 15 people all take buns, at least 13 vehicles, and the rent is 12× 13 = 156 yuan, 9×13-/kloc-.

3. If you rent two buses, the cost is 50×2= 100 yuan, and the remaining 1 15-44×2=27 people, the cost is 12×3=36 yuan. The total cost is 100+36= 136 yuan. There are no vacant seats;

4. If the bus rents 1 vehicle, the cost is 50 yuan, and the remaining 1 15-44 = 7 1 person rents buns, and the cost 12×8 = 96 yuan. The total cost is 50+96= 146 yuan. Free 1 seat.

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To sum up, it is most appropriate to rent two buses and three steamed buns.

Please give a favorable comment if you can. Thank you!