2. Phil Company has offered to sell 10,000 units of the same part to Schmidt Corporation for $18 per unit. Assuming there is no other use for the facilities, Schmidt should

a. make the part, as this would save $3 per unit.

b. buy the part, as this would save $3 per unit.

c. make the part, as this would save $4 per unit.

d. make the part, as this would save $2 per unit.

e. buy the part, as this would save $4 per unit.