CREATE TABLE table_70513 ("Call sign" TEXT, "Frequency MHz" FLOAT, "City of license" TEXT, "ERP W" FLOAT, "Height m  (  ft  ) " TEXT, "Class" TEXT, "FCC info" TEXT)

What's the sum of ERP W with a Frequency MHz that larger than 97.7?
SELECT COUNT("ERP W") FROM table_70513 WHERE "Frequency MHz" > '97.7'
SELECT COUNT("ERP W") FROM "table_70513" WHERE "Frequency MHz" > '97.7'