Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE visit (Total_spent INTEGER, visitor_id VARCHAR); CREATE TABLE visitor (id VARCHAR, Level_of_membership VARCHAR)
### Question:
What is the total ticket expense of the visitors whose membership level is 1?
### Answer:
SELECT SUM(t2.Total_spent) FROM visitor AS t1 JOIN visit AS t2 ON t1.id = t2.visitor_id WHERE t1.Level_of_membership = 1