Database: student_club
Question: List out the full name and total cost that member id "rec4BLdZHS2Blfp4v" incurred?
SQL: SELECT T1.first_name, T1.last_name, SUM(T2.cost) FROM member AS T1 INNER JOIN expense AS T2 ON T1.member_id = T2.link_to_member WHERE T1.member_id = 'rec4BLdZHS2Blfp4v'