Whiteside Corporation manufactures Part B89 in its internal processing division. Whiteside Corporation produces 13,000 units of Part B89 annually. The annual costs to produce Part B89 at the level of 13,000 units include: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Total cost $3.40 $8.40 $4.20 $3.00 $19.00 All of the fixed manufacturing overhead costs would continue whether Part B89 is made internally or purchased from an outside supplier. Assuming the company can purchase 13,000 units of the part from the Nadal Parts Company for $20.10 each, and the facilities currently used to make the part could be rented out to another manufacturer for $22,000 a year, what should Whiteside Corporation do? (Round calculations to the nearest cent.) A. Make the part and save $2.41 per unit. B. Buy the part and save $8.30 per unit. C. Buy the part and save $2.41 per unit. D. Make the part and save $8.30 per unit