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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.
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Hi Lucille81 --> Maybe it just makes it a bit more challenging?
'abv' = 'alcohol by volume' => anyway for our purposes to get A in the formula use this line:-
A = drinks['ounces'] * drinks['abv'] // note drinks is an object!
Hope this helps someone, somewhere...
For what is 'abv' here? It doesn't appear in Formula.