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_20 (us_cash_box VARCHAR, year VARCHAR, us_billboard VARCHAR)
### Question:
What is the US cash box before 1978 with a US billboard of 35?
### Answer:
SELECT us_cash_box FROM table_name_20 WHERE year < 1978 AND us_billboard = 35