Marigold Corp. sells two types of computer hard drives. The sales mix is 30%(Q-Drive) and 70% 2-Drive Plus). Q-Drive has variable costs per unit of $45 and a selling price of $90. Q-Drive Plus has variable costs per unit of $60 and a selling price of $150. The weighted average unit contribution margin for Marigold is $90. $77. $45.0 $58.5