Final answer:
Epsilon should choose to buy the part since the relevant cost to make it is $82 per unit.
Step-by-step explanation:
Epsilon should choose to buy the part since the relevant cost to make it is $82 per unit, as shown in the question.
The relevant cost to buy the part is $76 per unit, which is lower than the cost to make it.
Therefore, it is more cost-effective for Epsilon to buy the part rather than make it.