Answer:
525 units
Explanation:
You want the number of units sold at $135 each required to cover $81 per unit in variable cost and $24,300 in fixed cost, and produce $4050 in profit.
The contribution each sale makes is $135 -81 = $54. In order to produce a total of $24,300 +4050 = $28,350 in contribution, the number of units sold must be ...
n · $54 = $28350
n = 28350/54 = 525
Sale of 525 units is needed.