with total_OrderItems as ( select order_num, sum(quantity * item_price) as OrderTotal from OrderItems group by order_num ) select c.cust_name, o.order_num, toi.OrderTotal from Customers c join Orders o on c.cust_id = o.cust_id join total_OrderItems toi on toi.order_num = o.order_num order by c.cust_...