Vail is a ski resort in Colorado. During their busy period, one of their high-speed quad chair lifts unloads 1470 skiers per hour at the top of the slope. (FYI, a quad chair lift can carry four skiers per chair; a high-speed system can temporarily detach a chair from the moving wire rope to allow skiers to climb on or off each chair.) The ride from the bottom to the top takes 5 minutes. On average, how many skiers are riding on the lift at any one time? Show Calculation.