Joe runs the Service Division for a car dealership. The overall dealership has profit of $10 million on sales of $100 million and costs of $90 million. Joe's division contributed $9 million in sales and $7 million in costs. If the Service Division is evaluated as a profit center, what dollar amount is most relevant to Joe? a. $2 million b. $7 million c. $9 million d. $10 million