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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.
The results in the price_per_kg column are not checked. I have applied some incorrect formulas to count values of this column, and these solutions passed all the tests.