Gandy Company has 5,000 obsolete desk lamps that are carried in inventory at a manufacturing cost of $50,000. If the lamps are reworked for $20,000, they could be sold for $35,000. Alternatively, the lamps could be sold for $8,000 for scrap. In a decision model analyzing these alternatives, the sunk cost would be:
A. $8,000
B. $15,000
C. $20,000
D. $50,000