Which product has the highest total amount of quantity sold? Calculate its overall total price.
highest total amount of quantity refers to MAX(Quantity); overall total price = SUM(MULTIPLY(Quantity, Price));
SELECT T1.Name, SUM(T2.Quantity * T1.Price) FROM Products AS T1 INNER JOIN Sales AS T2 ON T1.ProductID = T2.ProductID GROUP BY T1.ProductID, T1.Name ORDER BY SUM(T2.Quantity) DESC LIMIT 1