a. The determination of the unit contribution margin is $36 per unit ($79 - $43).
b. The determination of the units to be sold for the company to break-even in units is (Fixed costs/contribution margin per unit)
= 11,389 units ($410,000/$36).
c. The determination of units to sell to earn an operating income of $234,000 is (Fixed costs + Operating income)/Contribution margin per unit
= 17,889 units ($410,000 + $234,000)/$36.
Data and Calculations:
Sales price per unit = $79
Variable cost per unit = $43
Contribution margin per unit = $36 ($79 - $43)
Fixed manufacturing and operating costs per month = $410,000
Learn more about using contribution margin per unit to determine break-even point here: brainly.com/question/21137380 and brainly.com/question/15684424