What's the retail price of the most expensive book written by Sam Smith? Determine the total profit generated by sales per customer. Note: Quantity should be reflected in the total profit calculation. Modify problem 2 to include only those customers who live in FL. Modify problem 3 to display the results with profit greater then $50. Determine the average retail price of books by publisher name and category. Include only the categories Children and Computer and the groups with an average retail price greater than $50.

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