CREATE TABLE table_5633 ("Frequency  ( MHz ) " FLOAT, "Call letters" TEXT, "Licensed location" TEXT, "Type" TEXT, "Format" TEXT)

Frequency (MHz) that has a Call letters of krmd-fm has what sum?
SELECT SUM("Frequency (MHz)") FROM table_5633 WHERE "Call letters" = 'krmd-fm'
SELECT SUM("Frequency (MHz)") FROM "table_5633" WHERE "Call letters" = 'krmd-fm'