Below is the list of tables from the database along with their columns and datatype. Need to generate an accurate SQL query for the question.
Only use the columns present in the respective table. Only use the columns which are required to generate the SQL query. Only use table joins if required and not otherwise.

### Tables ###
TABLE: CREATE TABLE table_79769 ( "Call sign" text, "Frequency MHz" real, "City of license" text, "ERP W" text, "Class" text, "FCC info" text )

### Question ###
Name the sum of frequency will call sign of k259aw

### Accurate SQL ###

SELECT SUM("Frequency MHz") FROM table_79769 WHERE "Call sign" = 'k259aw'