Write SQL query to solve given problem: List out root beer brand that is not caffeinated and not containing cane sugar. What is the total amount sold for this products?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.BrandName, SUM(T3.PurchasePrice) FROM rootbeerbrand AS T1 INNER JOIN rootbeer AS T2 ON T1.BrandID = T2.BrandID INNER JOIN `transaction` AS T3 ON T2.RootBeerID = T3.RootBeerID WHERE T1.CaneSugar = 'FALSE' AND T1.Caffeinated = 'FALSE' GROUP BY T1.BrandName