Tell me the sum of the grid with alfa romeo and toulo de graffenried
CREATE TABLE table_10283 (
    "Driver" text,
    "Constructor" text,
    "Laps" real,
    "Time/retired" text,
    "Grid" real
)
SELECT SUM("Grid") FROM table_10283 WHERE "Constructor" = 'alfa romeo' AND "Driver" = 'toulo de graffenried'
Below are sql tables schemas paired with instruction that describes a task. Using valid SQLite, write a response that appropriately completes the request for the provided tables. ### Instruction: Tell me the sum of the grid with alfa romeo and toulo de graffenried ### Input: CREATE TABLE table_10283 (
    "Driver" text,
    "Constructor" text,
    "Laps" real,
    "Time/retired" text,
    "Grid" real
) ### Response: SELECT SUM("Grid") FROM table_10283 WHERE "Constructor" = 'alfa romeo' AND "Driver" = 'toulo de graffenried'