SELECT t1.last_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id  =  t2.staff_id JOIN products AS t3 ON t2.product_id  =  t3.product_id ORDER BY t3.product_price LIMIT 1
Find the last name of the staff member who processed the complaint of the cheapest product.
SELECT t1.last_name FROM staff AS t1 JOIN complaints AS t2 ON t1.staff_id = t2.staff_id JOIN products AS t3 ON t2.product_id = t3.product_id ORDER BY t3.product_price LIMIT 1
select t1 . last_name from staff as t1 join complaints as t2 on t1 . staff_id = t2 . staff_id join products as t3 on t2 . product_id = t3 . product_id order by t3 . product_price limit value
Find the last name of the staff member who processed the complaint of the cheapest product .