A company has two departments, Y and Z that incur advertising expenses of $20,400. Advertising expenses are allocated based on sales. Department Y has sales of $456,000 and Department Z has sales of $684,000. The advertising expense allocated to Departments Y and Z, respectively, are: Multiple Choice $8,160;$12,240. $12,240;$8,160. $13,160;$7,240. $7,240;$13,160. $6,840;$13,560