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_67776 ( "Year" real, "Role" text, "Author" text, "Radio Station/Production Company" text, "Release/Air Date" text )

### Question ###
Role of narrator, and a Radio Station/Production Company of bbc audiobooks, and a Release/Air Date of 13 november 2008 is what sum of the year?

### Accurate SQL ###

SELECT SUM("Year") FROM table_67776 WHERE "Role" = 'narrator' AND "Radio Station/Production Company" = 'bbc audiobooks' AND "Release/Air Date" = '13 november 2008'