Travel agency/kloc-how to calculate the fee for children aged 0/2?

Travel agencies can enjoy 10% discount or 20% discount on adult price for children aged 12. Due to different tourism products/routes, different travel agencies, different seasons or times, different countries and other factors, the payment methods of travel agencies may be different. The standard of children's expenses settlement depends on factors such as age, tourism products, accommodation and air tickets. In some tourism products, children under 12 may enjoy a discount of 10% or 20% of the adult price, while in some tourism products that only include sightseeing, children's expenses may be slightly lower than that of adults. If the child needs to occupy a room alone, there will be a single room difference fee. Need to consult the specific travel route, time, country and travel agency's fee calculation standard. The World Tourism Organization defines TravelAgency as "a retail organization that provides the public with information about possible travel, accommodation and related services, including service fees and conditions.