Among the low quality product, which product has the highest line total? List the product name and its line total?
Low quality refers to the product's quality class, therefore Class = 'L'
SELECT T1.Name, T2.LineTotal FROM Product AS T1 INNER JOIN PurchaseOrderDetail AS T2 ON T1.ProductID = T2.ProductID WHERE Class = 'L' ORDER BY OrderQty * UnitPrice DESC LIMIT 1