Write SQL query to solve given problem: What is the average weight of the goods being transported on a single shipment ordered by S K L Enterprises Inc?. Keep the solution inside sql tag ```sql [SQL-Query] ```
SELECT AVG(T2.weight) FROM customer AS T1 INNER JOIN shipment AS T2 ON T1.cust_id = T2.cust_id WHERE T1.cust_name = 'S K L Enterprises Inc'