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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 tests swap actual / expected.
The rounding is inconsistent between price and sub-total, total. In one you are expected to write 1.50, in the other 1.5 .
The tests are rather weak:
https://www.codewars.com/kata/reviews/5494861f305bd8a28500003e/groups/5b65a25e42890f6570001732