Call sign of k231bg has what sum of erp w?
CREATE TABLE table_name_30 (erp_w INTEGER, call_sign VARCHAR)
SELECT SUM(erp_w) FROM table_name_30 WHERE call_sign = "k231bg"
### Context: CREATE TABLE table_name_30 (erp_w INTEGER, call_sign VARCHAR) ### Question: Call sign of k231bg has what sum of erp w? ### Answer: SELECT SUM(erp_w) FROM table_name_30 WHERE call_sign = "k231bg"