CREATE TABLE table_name_50 (november VARCHAR(255), september VARCHAR(255), february VARCHAR(255), march VARCHAR(255))
What is the total number for November, larger than 8.53 in February, 20.21 in March, and less than 7.9 in September?
    
SQL: SELECT COUNT(november) FROM table_name_50 WHERE february > 8.53 AND march = 20.21 AND september < 7.9