Answer:
Product D
Step-by-step explanation:
The contribution margin will be used for this assessment
Contribution margin is the selling price of an item less the associated variable selling cost to determine the extra profit for each unit of an item sold.
However , the grinding hour being the constraint in this scenario , the contribution per minute of production will be used.
A B C D
Direct materials 16.60 20.50 13.50 16.20
Direct labor 18.60 22.00 16.40 10.40
Variable Man. 5.40 6.60 9.10 6.10
Variable selling C. 3.60 4.10 3.80 4.50
Selling price 83.70 76.10 72.90 67.60
Contribution/unit 39.50 22.90 30.10 30.40
Minute /unit 2.50 1.60 1.20 0.8
Contribution /min 15.8 14.13 25.08 38
Product D with the highest contribution per minute of production makes the most profitable use of the machine.