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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.
I think there needs to be a summary sentence in the example paragraph. The total wait time is 26 minutes becuase customer1(4 minutes), customer2(9 minutes), and customer3(13 minutes). It took me a while to figure out how to the total was 26 minutes.