Pasha Company produced 50 defective units last month at a unit manufacturing cost of $30. The defective units were discovered before leaving the plant. Pasha can sell them "as is" for $20 or can rework them at a cost of $15 and sell them at the regular price of $50. Which of the following is not relevant to the sell-or-rework decision?

a. 30

b. 20

c. 15

d. 50