Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_name_31 ( yards VARCHAR, sack VARCHAR, p_ko_ret VARCHAR )

### Question ###
What is the total of all YARDS with 0 SACK and less than 14 P/KO RET?

### Accurate SQL ###

SELECT COUNT(yards) FROM table_name_31 WHERE sack = 0 AND p_ko_ret < 14