Below is an context that describes a sql query, paired with an question that provides further information. Write an answer that appropriately completes the request.  # noqa: E501
### Context:
CREATE TABLE table_name_96 (grid INTEGER, manufacturer VARCHAR, rider VARCHAR)
### Question:
Can you tell me the sum of Grid that has the Manufacturer of aprilia, and the sandro cortese?
### Answer:
SELECT SUM(grid) FROM table_name_96 WHERE manufacturer = "aprilia" AND rider = "sandro cortese"