CREATE TABLE table_35801 ("Date" TEXT, "Tournament" TEXT, "Location" TEXT, "Winner" TEXT, "Score" TEXT, "1st prize  (  $  ) " FLOAT)

what is the 1st prize for may 21
SELECT SUM("1st prize ( $ )") FROM table_35801 WHERE "Date" = 'may 21'
SELECT SUM("1st prize ( $ )") FROM "table_35801" WHERE "Date" = 'may 21'