CREATE TABLE table_58766 ("Place" TEXT, "Player" TEXT, "Country" TEXT, "Score" TEXT, "To par" FLOAT, "Money  (  $  ) " FLOAT)

What is the average money for a to par of 15, and is from the United States?
SELECT AVG("Money ( $ )") FROM table_58766 WHERE "To par" = '15' AND "Country" = 'united states'
SELECT AVG("Money ( $ )") FROM "table_58766" WHERE "Country" = 'united states' AND "To par" = '15'