CREATE TABLE table_75555 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Height m  (  ft  ) " CLOB, "FCC info" CLOB)

How many ERP W is it that has a Call sign of w273bs?
SELECT SUM("ERP W") FROM table_75555 WHERE "Call sign" = 'w273bs'
SELECT SUM("ERP W") FROM "table_75555" WHERE "Call sign" = 'w273bs'