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Collections are a way for you to organize kata so that you can create your own training routines. Every collection you create is public and automatically sharable with other warriors. After you have added a few kata to a collection you and others can train on the kata contained within the collection.
Get started now by creating a new collection.
or maybe you could just write in english...
Автор, исправь задание, здесь нет вычисления скидки по проценту . Понижение от общей суммы происходит на основе фикисированных значений: 20 и 50.