Answer:
2870 feet.
Explanation:
They start at base camp which is 2000 feet, which means that they only have to climb 20 320 - 2000 feet. That equals 18 320 feet.
2. Then they climb 15 235 feet, which means that they have 18 320 - 15 235 feet left to climb. That equals 3 085 feet.
3. Then they descend 183 feet which means that went down the mountain 283 feet. Therefore they will have 13 085 + 183 feet left to climb. That equals 3 268 feet.
4. finally they climb 398 feet which means that they will have 3 268 - 398 feet left to climb. That equals 2870 feet.