Cam Inc. produces a part that is used in the manufacture of one of its products. The unit manufacturing costs of this part asuming a production level of 6,300 units are as follows Direct materials $4.30 Direct labor $4.10 Variable manufacturing overhead $3.10 Fbred manufacturing overhead $150 Total cost $13.00 The fixed overhead costs are unavoidable Shaft Company has offered to sell 6,300 units of the same part to Cam Inc for 514 40 per unt. Assuming the company has no other use for its facilities, what should Cam Inc do? O A. Buy from Shaft and save $1.40 per unit OB. Make the part and save $5.90 per unit OC. Make the part and save $2.90 per unit OD. Make the part and save $10.00 per unit. Click to select your