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_99 (decile INTEGER, area VARCHAR, roll VARCHAR)
### Question:
What is the total decile in the area of Normanby with a roller smaller than 157?
### Answer:
SELECT SUM(decile) FROM table_name_99 WHERE area = "normanby" AND roll < 157