What is the average quantities ordered with payment method code 'MasterCard' on invoices?
CREATE TABLE Invoices (
    Order_Quantity INTEGER,
    payment_method_code VARCHAR
)
SELECT AVG(Order_Quantity) FROM Invoices WHERE payment_method_code = "MasterCard"
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 is the average quantities ordered with payment method code 'MasterCard' on invoices? ### Input: CREATE TABLE Invoices (
    Order_Quantity INTEGER,
    payment_method_code VARCHAR
) ### Response: SELECT AVG(Order_Quantity) FROM Invoices WHERE payment_method_code = "MasterCard"