Answer:
To decide whether Cardinal should buy or make the part, we need to compare the total cost of making the part to the cost of buying it. The total cost of making the part is:
Direct materials + Direct labor + Variable overhead + Fixed overhead applied
= $4 + $17 + $7 + $10
= $38
The cost of buying the part from Oriole is $42.
Since the cost of buying the part is higher than the total cost of making it, it would be more cost-effective for Cardinal to make the part rather than buy it.
However, it is important to note that 60% of the fixed overhead applied will continue regardless of what decision is made. This means that if Cardinal decides to buy the part, it will still incur 60% of the fixed overhead cost, which will increase the total cost of buying the part to:
Cost of buying the part + 60% of fixed overhead applied
= $42 + (60% x $10)
= $48
Even with the additional fixed overhead cost, the total cost of buying the part is still higher than the cost of making it. Therefore, it would still be more cost-effective for Cardinal to make the part rather than buy it.