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_1601027_1 (headphone_class VARCHAR, us_msrp VARCHAR)
### Question:
How many headphone classes have a US MSRP of $150?
### Answer:
SELECT COUNT(headphone_class) FROM table_1601027_1 WHERE us_msrp = "$150"