CREATE TABLE table_name_7 (rating VARCHAR(255), air_date VARCHAR(255), weekly_winner VARCHAR(255))
What is Rating, when Air Date is "July 24, 2008*", and when Weekly Winner is "Sales Rep. Oscar Ledezma"?
    
SQL: SELECT rating FROM table_name_7 WHERE air_date = "july 24, 2008*" AND weekly_winner = "sales rep. oscar ledezma"