Vaughn Manufacturing sells two types of computer hard drives. The sales mix is 30% (Q-Drive) and 70% (Q-Drive Plus). Q-Drive has variable costs per unit of $150 and a selling price of $210. Q-Drive Plus has variable costs per unit of $165 and a selling price of $255. Vaughns fixed costs are $1215000. How many units of Q-Drive would be sold at the break-even point?

A. 10500.

B. 4500.

C. 15000.

D.6075.