Final answer:
To earn an after-tax net income of $18,000, ABC COMPANY needs to sell 21,750 units.
Step-by-step explanation:
To calculate the number of units that need to be sold in order to earn an after-tax net income of $18,000, we need to consider the contribution margin per unit. The contribution margin is the selling price per unit minus the variable cost per unit, which in this case is $30 - $22 = $8.
To find the break-even point, we can use the formula:
Break-even point (in units) = (Fixed Costs + Target Profit) / Contribution Margin
Substituting the given values, (140,000 + 18,000) / 8 = 21,750 units. Therefore, the correct answer is option a. 21,750 units.