Name the sum of inversions for opened of april 20, 2002
CREATE TABLE table_68350 (
    "Name" text,
    "Park" text,
    "Country" text,
    "Inversions" real,
    "Opened" text,
    "Status" text
)
SELECT SUM("Inversions") FROM table_68350 WHERE "Opened" = 'april 20, 2002'
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: Name the sum of inversions for opened of april 20, 2002 ### Input: CREATE TABLE table_68350 (
    "Name" text,
    "Park" text,
    "Country" text,
    "Inversions" real,
    "Opened" text,
    "Status" text
) ### Response: SELECT SUM("Inversions") FROM table_68350 WHERE "Opened" = 'april 20, 2002'