Table schema:
CREATE TABLE table_20803241_1 (type_of_fare VARCHAR, cash_fare VARCHAR, day_pass VARCHAR)

Question: When n/a is the cash fate and n/a is the 31-day pass how many types of fare are there?
SQL: SELECT COUNT(type_of_fare) FROM table_20803241_1 WHERE 31 - day_pass = "N/A" AND cash_fare = "N/A"