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_127511_1 (ion_torrent_pgm VARCHAR, sanger_3730xl VARCHAR)

### Question ###
How many times was Sanger 3730xl $2400 usd?

### Accurate SQL ###

SELECT COUNT(ion_torrent_pgm) FROM table_127511_1 WHERE sanger_3730xl = "$2400 USD"