64. Concord Corporation 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 $120 and a selling price of $180. Q-Drive Plus has variable costs per unit of $135 and a selling price of $225. Concord's fixed costs are $1012500. How many units of Q-Drive would be sold at the break-even point? A)12500 B)8750 C) 3750 D)5063