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_9639 ( "Morse Taper number" real, "Taper" text, "B (max)" real, "C (max)" real, "D (max)" real )

### Question ###
What's the total of the Morse Taper number when the D (max) is 20 and the B (max) greater than 94?

### Accurate SQL ###

SELECT SUM("Morse Taper number") FROM table_9639 WHERE "D (max)" = '20' AND "B (max)" > '94'