Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_64 (decile INTEGER, area VARCHAR, roll VARCHAR)
### Question:
What is the total decile with an Area of whitianga, and a Roll smaller than 835?
### Answer:
SELECT SUM(decile) FROM table_name_64 WHERE area = "whitianga" AND roll < 835