CREATE TABLE table_17706 ("Year" FLOAT, "Total Region" FLOAT, "Biggenden" FLOAT, "Eidsvold" FLOAT, "Gayndah" FLOAT, "Monto" FLOAT, "Mundubbera" FLOAT, "Perry" FLOAT)

What is the gayndah when perry is 304?
SELECT MAX("Gayndah") FROM table_17706 WHERE "Perry" = '304'
SELECT MAX("Gayndah") FROM "table_17706" WHERE "Perry" = '304'