What should I buy as a cocktail leaner: a research

Hi!
I am currently developing a web service to aggregate cocktail knowledge. And we have a project to mine the data we have.
The result, we can now calculate "the essential X items you should have to learn Y". Y represents the a certain aspects of knowledge, for example, cocktail or recipes. X represents the number of the items you needed for maximum usage. In simple terms, now we can calculate the 10 items you should buy to mix maximum cocktails!

You can view the cocktail results here:
http://www.wacanai.com/data_mining/learnin_guide/learning_guide_page.php?uid=1&lang=en

Also, the results are daily updated by users' contribution everyday. You can see the other calculated results here:
http://www.wacanai.com/data_mining/learnin_guide/learning_guide_index.php?lang=en