CREATE TABLE table_68662 ("Name" TEXT, "Years" TEXT, "Gender" TEXT, "Area" TEXT, "Authority" TEXT, "Decile" FLOAT, "Roll" FLOAT)

What is the total amount of decile with the authority of state around the Pokuru School and a roll smaller than 109?
SELECT SUM("Decile") FROM table_68662 WHERE "Authority" = 'state' AND "Name" = 'pokuru school' AND "Roll" < '109'
SELECT SUM("Decile") FROM "table_68662" WHERE "Authority" = 'state' AND "Name" = 'pokuru school' AND "Roll" < '109'