CREATE TABLE table_49054 ("Call sign" CLOB, "Frequency MHz" FLOAT, "City of license" CLOB, "ERP W" FLOAT, "Class" CLOB, "FCC info" CLOB)

What is the ERP W for the station whose call sign is K248BJ and whose frequency MHz is higher than 97.5?
SELECT AVG("ERP W") FROM table_49054 WHERE "Call sign" = 'k248bj' AND "Frequency MHz" > '97.5'
SELECT AVG("ERP W") FROM "table_49054" WHERE "Call sign" = 'k248bj' AND "Frequency MHz" > '97.5'