Find the total quantity of products associated with the orders in the "Cancelled" status.
SELECT sum(t2.order_quantity) FROM customer_orders AS t1 JOIN order_items AS t2 ON t1.order_id  =  t2.order_id WHERE t1.order_status  =  "Cancelled"
SELECT sum(t2.order_quantity) FROM customer_orders AS t1 JOIN order_items AS t2 ON t1.order_id  =  t2.order_id WHERE t1.order_status  =  "Cancelled"
[{'sum(t2.order_quantity)': 77}]