The unit product cost of a part manufactured by Serrano Corporation is computed as follows: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Unit product cost $12.70 20.30 2.50 10.40 $45.90 The company makes 13,000 units per year of the part. An outside supplier has offered to sell the company all of these parts It needs for $41.80 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 $62,400 per year. If the part were purchased from the outside supplier, all of the direct labor cost of the part would be avoided. However, $5.70 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. Required: a. How much of the unit product cost of $45.90 is relevant in the decision of whether to make or buy the part? (Round "Per Unit" to 2 decimal places.) b. What is the financial advantage (disadvantage) of purchasing the part rather than making it? a. Relevant manufacturing cost per unit