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_203_877 ( id number, "year" number, "single" text, "us cashbox" number, "us hot 100" number, "uk singles" number )

### Question ###
how many songs charted on both the us cashbox and us hot 100 but not the uk singles ?

### Accurate SQL ###

SELECT COUNT("single") FROM table_203_877 WHERE NOT "us cashbox" IS NULL AND NOT "us hot 100" IS NULL AND "uk singles" IS NULL