CREATE TABLE table_name_80 (points INT, chassis VARCHAR, entrant VARCHAR)

Name the sum of points for chassis of maserati 250f and entrant of officine alfieri maserati
SELECT SUM(points) FROM table_name_80 WHERE chassis = "maserati 250f" AND entrant = "officine alfieri maserati"
SELECT SUM("points") FROM "table_name_80" WHERE "chassis" = "maserati 250f" AND "entrant" = "officine alfieri maserati"