Step-by-step explanation:
The computation is as follows
1. For break even point in unit sales
= (Fixed expenses ) ÷ (Contribution margin per unit)
where,
Contribution margin per unit = Selling price per unit - Variable expense per unit
= ($4,200) ÷ ($15 - $12)
= ($4,200) ÷ ($3)
= 1,400 units
2. For break even point in unit sales
= (Fixed expenses ) ÷ (Contribution margin ratio)
where,
Contribution margin per unit = Selling price per unit - Variable expense per unit
And, the contribution margin ratio is
= (Contribution margin per unit) ÷ (Selling price per unit)
= ($3) ÷ ($15) × 100
= 20%
Now the break even point in unit sales is
= ($4,200) ÷ (20%)
= $21,000
3. Now the new break even point in unit sales is
= (Fixed expenses ) ÷ (Contribution margin per unit)
where,
Contribution margin per unit = Selling price per unit - Variable expense per unit
= ($4,800) ÷ ($15 - $12)
= ($4,800) ÷ ($3)
= 1,600 units
And, the break even point in unit sales
= (Fixed expenses ) ÷ (Contribution margin ratio)
where,
Contribution margin per unit = Selling price per unit - Variable expense per unit
And, the contribution margin ratio is
= (Contribution margin per unit) ÷ (Selling price per unit)
= ($3) ÷ ($15) × 100
= 20%
Now the break even point in unit sales is
= ($4,800) ÷ (20%)
= $24,000