Explaining and solving this Power problem?

A traditional, double seat chiarlift can move 1200 people per hour (with an average mass of 60.0 kg) up a ski hill. A high-speed quad chair can move 2400 people in 30.0 minutes up the hill. If the upper terminal is 100m higher than the lower terminal, how much power would each type of lift need just to overcome the force of gravity? Explain how they would need more power than the amount used to overcome gravity.