Table: radio_stations_13
Columns: frequency_mhz
call_letters
licensed_location
type
format

Question: Type of primary, and a Call letters of kbjs has what format?
SQL: SELECT "format" FROM radio_stations_13 WHERE "type" = 'primary' AND "call_letters" = 'kbjs'

Question: Frequency (MHz) that has a Type of primary, and a Call letters of ktbb-fm has what total number?
SQL: SELECT COUNT("frequency_mhz") FROM radio_stations_13 WHERE "type" = 'primary' AND "call_letters" = 'ktbb-fm'

Question: Type of primary, and a Call letters of kktx-fm has what average Frequency (MHz)?
SQL: SELECT AVG("frequency_mhz") FROM radio_stations_13 WHERE "type" = 'primary' AND "call_letters" = 'kktx-fm'

Question: Frequency (MHz) that has a Call letters of krmd-fm has what sum?
SQL: SELECT SUM("frequency_mhz") FROM radio_stations_13 WHERE "call_letters" = 'krmd-fm'