A data analyst has created a user-defined function using the following code:

CREATE FUNCTION price(spend DOUBLE, units DOUBLE)
RETURNS DOUBLE
RETURN spend / units;

CREATE FUNCTION price(spend DOUBLE, units DOUBLE)
RETURNS DOUBLE
RETURN spend / units;

Which of the following code blocks can be used to apply this function to the customer_spend and customer_units columns of the customer_summary table to create a customer_price column?