What are all approximate sales for the author Laura Ingalls Wilder?
CREATE TABLE table_27409 (
    "Book series" text,
    "Author" text,
    "Original language" text,
    "No. of installments" text,
    "First published" text,
    "Approximate sales" text
)
SELECT "Approximate sales" FROM table_27409 WHERE "Author" = 'Laura Ingalls Wilder'
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: What are all approximate sales for the author Laura Ingalls Wilder? ### Input: CREATE TABLE table_27409 (
    "Book series" text,
    "Author" text,
    "Original language" text,
    "No. of installments" text,
    "First published" text,
    "Approximate sales" text
) ### Response: SELECT "Approximate sales" FROM table_27409 WHERE "Author" = 'Laura Ingalls Wilder'