Henry and wayne operate a charter flying service out of breckenridge, which has an elevation of 9,600 feet above sea level. henry has two flights scheduled for the day. he is taking a couple from breckenridge to hamilton which has a drop of 35% in elevation. at hamilton, he is picking up 3 business men and taking them to denver which has a drop in elevation of 15% from hamilton. this puts them at an elevation of 5304 feet above sea level. wayne also has two flights scheduled for the day. he is taking a family from breckenridge to colorado springs which has a -drop in elevation. at colorado springs, he is picking up some fishermen and taking them to englewood which has a -drop in elevation from colorado springs. this puts them at an elevation of feet above sea level. after henry and wayne have both finished their two flights of the day, the final difference in their elevations from each other is feet.