Lasso Corporation manufactures a variety of appliances which all use Part B89. Currently, Lasso Corporation manufactures Part 389 in its internal manufacturing process. Lasso Corporation produces 10,000 units of Part 389 annually. The annual costs to product Part 389 at the level of 10,000 units include: Direct materials Direct labor Variable manufacturing overhead Fixed manufacturing overhead Total cost $3.30 $8.10 $4.20 $3.30 $18.90 All of the fixed manufacturing overhead costs would continue whether Part B89 is made internally or purchased from an outside supplier. Lasso Corporation has no alternative use for its manufacturing facilities. Nadal Parts Company has offered to sell 10,000 units of Part 389 to Lasso Corporation for $20.10 per unit. What should Lasso Corporation do? O A. Make the part and save $12.60 per unit. OB. Make the part and save $4.50 per unit. O C. Make the part and save $9.30 per unit. OD. Buy from Nadal Parts Company and lose $1.20 per unit