Answer:
Vaughn must sell 1588 Units in 2020 to maintain the same income level as 2019
Explanation:
Selling price for 2020 = 500 per unit
Variable cost for 2020 = 300 x 10% + 300
= 300 x 0.1 + 300
= 30 + 300
= 330 per unit
Fixed cost for 2020 = 240000-10000
= 230000
Required unit = (Fixed cost+Net income)/Contribution margin per unit
= (230000+40000) / (500-330)
= 270000 / 170
= 1588.24
Required unit = 1588 Units