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_45130 ( "Rank" real, "Company" text, "Headquarters" text, "Industry" text, "Sales (billion $)" real, "Profits (billion $)" real, "Assets (billion $)" real, "Market Value (billion $)" real )

### Question ###
What is the average sales in billions of walmart, which has more than 15.7 billion in profits?

### Accurate SQL ###

SELECT AVG("Sales (billion $)") FROM table_45130 WHERE "Company" = 'walmart' AND "Profits (billion $)" > '15.7'