text: 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_50 (engine_capacity VARCHAR, model VARCHAR, mpg_us_extra_urban VARCHAR, transmission VARCHAR, mpg_us_urban VARCHAR)
  ### Question:
  What is the total engine capacity of the a4 transmission, which has an urban mpg-US greater than 19, an mpg-us extra-urban greater than 38.6, and an aveo model?
  ### Answer:
  SELECT COUNT(engine_capacity) FROM table_name_50 WHERE transmission = "a4" AND mpg_us_urban > 19 AND mpg_us_extra_urban > 38.6 AND model = "aveo"