Climbing gear required to reach the summit may cost in excess of US$8,000, and most climbers also use bottled oxygen, which adds around US$3,000. The permit to enter the Everest area from the south via Nepal costs US$10,000 to US$25,000 per person, depending on the size of the team. The ascent typically starts at one of the two base camps near the mountain, both of which are approximately from Kathmandu and from Lhasa (the two nearest cities with major airports). Transferring one's equipment from the airport to the base camp may add as much as US$2,000.