CREATE TABLE table_name_55 (money___ NUMBER, to_par VARCHAR2, country VARCHAR2)

What is the average money for a to par of 15, and is from the United States?
SELECT AVG(money___) AS $__ FROM table_name_55 WHERE to_par = 15 AND country = "united states"
SELECT AVG("money___") AS "$__" FROM "table_name_55" WHERE "country" = "united states" AND "to_par" = 15