Table schema:
CREATE TABLE table_name_7 (rating VARCHAR, air_date VARCHAR, weekly_winner VARCHAR)

Question: 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"