u28c มีจำนวนค่าขนส่งทั้งหมดเท่าไร?ไม่จำเป็นต้องใช้ตารางทั้งหมด
What is the total amount of freight produced of u28c?It is not neccessary to use all the tables.
 table_name_49:  (total_produced [ VARCHAR ] service [ VARCHAR ] builder’s_model [ VARCHAR) ]
SELECT total_produced FROM table_name_49 WHERE service = "freight" AND builder’s_model = "u28c"