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_42421 ( "Pick" real, "Player" text, "Country of origin*" text, "PBA team" text, "College" text )

### Question ###
What is the sum of the pick numbers for the player that went to San Miguel Beermen who played at San Sebastian?

### Accurate SQL ###

SELECT SUM("Pick") FROM table_42421 WHERE "PBA team" = 'san miguel beermen' AND "College" = 'san sebastian'