Answer:
1. $22,000 units
2. $39,000 units
3. $40,800 units
Step-by-step explanation:
In this question we use the formula of break-even point in unit sales which is shown below: 
1. Break even point
= (Fixed expenses) ÷ (Contribution margin per unit) 
where, 
Contribution margin per unit = Selling price per unit - Variable expense per unit 
= $53 - $35
= $18
And, the other items values would remain the same 
Now put these values to the above formula 
So, the value would equal to 
= ($396,000) ÷ ($18) 
= $22,000 units
2. 
Break even point = (Fixed expenses + target profit) ÷ (Contribution margin per unit) 
where, 
Contribution margin per unit = Selling price per unit - Variable expense per unit 
= $47 - $35
= $12
And, the other items values would remain the same 
Now put these values to the above formula 
So, the value would equal to 
= ($396,000 + $72,000) ÷ ($12) 
= ($468,000) ÷ ($12) 
= 39,000 units 
3. 
Break even point = (Fixed expenses + target profit) ÷ (Contribution margin per unit) 
where, 
Contribution margin per unit = Selling price per unit - Variable expense per unit 
= $47 - $35
= $12
And, the other items values would remain the same 
Now put these values to the above formula 
So, the value would equal to 
= ($396,000 + $93,600) ÷ ($12) 
= ($489,600) ÷ ($12) 
= 40,800 units