On vacation Isfa hiked to the 9364 foot summit of Haleakala volcano in Hawaii. The next day she went scuba diving at a depth of 68 feet below sea level. What is the difference between the elevation of the summit of Haleakala and the depth Isfa dove?

feet

Box 1: Enter your answer as an integer or decimal number. Examples: 3, -4, 5.5172
Enter DNE for Does Not Exist, oo for Infinity