The price of a single charter boat in Xizha is 480 yuan/boat/one-way, the price of a shared charter boat is 60 yuan/person/one-way, and children are half price. The single charter ship prices in Dongzha are divided into two types based on the number of people: 160 yuan/ship for 4 people or less, 240 yuan/ship for 4 people or more, and 30 yuan/ship for shared charter.