Answer:
13,085 units
Step-by-step explanation:
The computation of the units needed to sell is shown below:
But before that first we have to compute the current operating income which is shown below:
Current operating income = Sales - variable cost - Fixed cost
= ($275 - $210) × 10,500 units - $640,000
= $42,500
Now
Increased fixed cost is
= $640,000 + $11,000
= $651,000
And,
Increased variable cost per unit is
= $210 + $12
= $222
Now
Sales needed to maintain Current operating income is
= (Fixed cost + Current operating income) ÷ (Sales price per unit - Variable cost per unit)
= ($651,000 + $42,500) ÷ ($275 - $222)
= 13,085 units