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_1637041_6 ( avg_start VARCHAR, winnings VARCHAR )

### Question ###
What is the average start for the season with $7,220 in winnings?

### Accurate SQL ###

SELECT avg_start FROM table_1637041_6 WHERE winnings = "$7,220"