Table schema:
CREATE TABLE table_name_24 (game INTEGER, set_4 VARCHAR, set_3 VARCHAR)

Question: What is the sum of the Game with a Set 4 of 25-21 and a Set 3 of 25-23?
SQL: SELECT SUM(game) FROM table_name_24 WHERE set_4 = "25-21" AND set_3 = "25-23"