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 table_name_18 (location VARCHAR, tournament VARCHAR)
### Question:
What is the lowest first prize of the Mercedes Championships tournament in California?
### Answer:
SELECT MIN(1 AS st_prize___) AS $__ FROM table_name_18 WHERE location = "california" AND tournament = "mercedes championships"