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_4 ( evening_gown INTEGER, average VARCHAR, interview VARCHAR, swimsuit VARCHAR )

### Question ###
What is the sum of the evening gown scores where the interview score is less than 8.77, the swimsuit score is equal to 7.8, and the average score is less than 8.2?

### Accurate SQL ###

SELECT SUM(evening_gown) FROM table_name_4 WHERE interview < 8.77 AND swimsuit = 7.8 AND average < 8.2