Answer:
1,800 units
Step-by-step explanation:
With regards to the above, we need to find first the contribution margin of Q drive.
Contribution margin of Q drive = Selling price - Variable costs per unit
= $90 - $30
= $60
We will also find contribution margin of Q drive plus
Contribution margin of Q drive plus = Selling price - Variable costs per unit
= $135 - $45
= $90
Therefore, the combine contribution margin for both drive
= 30% × $60 + 70% × $90
= $18 + $63
= $81
The next step is to find the total break even point
= Crane company's fixed costs / Combined contribution margin
= $486,000 / $81
= 6,000 units
Furthermore, it means that Q drive would be sold at the break even point = Total break even point × Sales mix
= 6,000 × 30%
= 1,800 units