Answer: $58,000
Step-by-step explanation:
Operating income for 28,000 units = Contribution margin for 28,000 units - Fixed costs
Contribution margin for 28,000 units:
= 28,000 units * Contribution margin of 30,000 units / 30,000 units
= 28,000 * 105,000 / 30,000
= $98,000 units
Operating income for 28,000 units = 98,000 - 40,000
= $58,000