CREATE TABLE table_36971 ("Date" CLOB, "Tournament" CLOB, "Location" CLOB, "Winner" CLOB, "Score" CLOB, "1st prize  (  $  ) " FLOAT)

What is the total number of first prizes in USD for the Canadian Open?
SELECT SUM("1st prize ( $ )") FROM table_36971 WHERE "Tournament" = 'canadian open'
SELECT SUM("1st prize ( $ )") FROM "table_36971" WHERE "Tournament" = 'canadian open'