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_58 (erp_w VARCHAR, class VARCHAR, frequency_mhz VARCHAR)
### Question:
What is the total erp w of class c3, which has a frequency mhz less than 89.9?
### Answer:
SELECT COUNT(erp_w) FROM table_name_58 WHERE class = "c3" AND frequency_mhz < 89.9