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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.
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I really don't understand the description.
coffees = [20,5] -> 32
Cust 1 20 = 20
Cust 2 20+2+5 = 27 not 32
or
Cust 1 5 = 5
Cust 2 5+2+20 = 27 still not 32
Must be miss understanding something, or it's not clear, I'm missing a calculation or magic number?