select T1.cust_name, T1.order_num, T2.OrderTotal from ( select Customers.cust_name, Orders.order_num from Customers left join Orders on Orders.cust_id = Customers.cust_id ) T1 left join ( select order_num, sum(quantity * item_price) as OrderTotal FROM OrderItems GROUP BY order_num ) T2 on T1.order_n...