CREATE TABLE table_name_96 (grid NUMBER, manufacturer VARCHAR2, rider VARCHAR2)

Can you tell me the sum of Grid that has the Manufacturer of aprilia, and the sandro cortese?
SELECT SUM(grid) FROM table_name_96 WHERE manufacturer = "aprilia" AND rider = "sandro cortese"
SELECT SUM("grid") FROM "table_name_96" WHERE "aprilia" = "manufacturer" AND "rider" = "sandro cortese"