human
Considering the provided database schema and associated query, produce SQL code to retrieve the answer to the query. 
###Database Schema: Call sign, Frequency MHz, City of license, ERP W, Class, FCC info
###Question: What is the total erp w of class c3, which has a frequency mhz less than 89.9?
gpt
SELECT COUNT ERP W FROM table WHERE Class = c3 AND Frequency MHz < 89.9