Write SQL query to solve given problem: Please calculate the average unit price for products of Formaggi Fortini s.r.l.. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT SUM(T1.UnitPrice) / COUNT(T1.SupplierID) FROM Products AS T1 INNER JOIN Suppliers AS T2 ON T1.SupplierID = T2.SupplierID WHERE T2.CompanyName = 'Formaggi Fortini s.r.l.'