Write SQL query to solve given problem: Which products by Plutzer Lebensmittelgromrkte AG were discontinued and what are their price?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT T1.UnitPrice FROM Products AS T1 INNER JOIN Suppliers AS T2 ON T1.SupplierID = T2.SupplierID WHERE T2.CompanyName = 'Plutzer Lebensmittelgromrkte AG' AND T1.Discontinued = 1