most of the other doctors involved were confident that the Sherpa’s condition would continue to improve now that he was 3,700 feet lower than Camp Two; descending as little as 2,000 feet is typically enough to bring about complete recovery from HAPE. For this reason, Hunt explains, “there was no discussion of a helicopter” to evacuate Ngawang from Base Camp to Kathmandu, which would have cost $5,000.