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unit product cost

Managerial Accounting
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Ahringer Company makes 50,000 units per year of a part it uses in the products it manufactures. The unit product cost of this part is computed as follows:

Direct materials 19.10
Direct labor 21.70
Variable manufacturing overhead 2.10
Fixed manufacturing overhead 14.20
Unit product cost 57.10

An outside supplier has offered to sell the company all of these parts it needs for 50.10 a unit. If the company accepts this offer, the facilities now being used to make the part could be used to make more units of a product that is in high demand. The additional contribution margin on this other product would be 135,000 per year.

If the part were purchased from the outside supplier, all of the direct labor cost of the part would be avoided. However, 9.30 of the fixed manufacturing overhead cost being applied to the part would continue even if the part were purchased from the outside supplier. This fixed manufacturing overhead cost would be applied to the company's remaining products.
Reference: 13-8

How much of the unit product cost of 57.10 is relevant in the decision of whether to make or buy the part?

57.10
21.70
42.90
47.80

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How much of the unit product cost of 57.10 is relevant in the ...

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This provides the steps to calculate the unit product cost

$2.19