Sheffield Corp. 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 $90 and a selling price of $150. Q-Drive Plus has variable costs per unit of $105 and a selling price of $195, Sheffield's fixed costs are $1296000. How many units of Q-Drive would be sold at the break even point? 4800 6480 16000 11200