Table schema:
CREATE TABLE table_name_80 (time_to_ft__m__at_40 VARCHAR, shell__lb_ VARCHAR, max_height__ft_ VARCHAR)

Question: What is the amount of time (sum) at 40° that it takes a 16 lb shell to reach a maximum of no more than 22,000 ft?
SQL: SELECT COUNT(time_to_ft__m__at_40) AS °__seconds_ FROM table_name_80 WHERE shell__lb_ = 16 AND max_height__ft_ < 22 OFFSET 000