Spahr Company produces a part that is used in the manufacture of one of its products. The unit manufacturing costs of this part, assuming a production level of 5,000 units, are as follows. Direct materials Direct labour Variable manufacturing overhead Fixed manufacturing overhead Total cost The fixed overhead costs are unavoidable. $2.00 $4.00 $3.00 $1.00 $10.00 Erickson Company has offered to sell 5,000 units of the same part to Spahr Company for $11 per unit. Assuming the company has no other use for its facilities, what should Spahr Company do O A. Make the part and save $1 per unit. OB. Make the part and save $5 per unit. O C. Make the part and save $2 per unit. OD. Buy from Erickson and save $1 per unit. Click to select your