You decide to open up your own bookstore and create a loyalty program that gives customers awards for purchasing through your store.

Use this graph to calculate books per points:

0 books = no points

1 book = 10 points

2 books = 30 points

3 books = 60 points

4+ books = 120 points

The user should enter number of books they purchase this month and it will print how many points they have

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