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_67 (matches INTEGER, overs VARCHAR, economy_rate VARCHAR)
### Question:
How many matches were played that resulted in less than 59.1 overs and a 6.78 Economy rate?
### Answer:
SELECT SUM(matches) FROM table_name_67 WHERE overs < 59.1 AND economy_rate > 6.78