Material Z is highly dangerous: there are 500 liters in stock and there is no further use for it. The company will have to pay £4 per liter to have it removed. The current market purchase price is £12 per liter and the material in stock originally cost £10 per liter. A potential project needs 600 liters of Material Z.
What is the relevant cost for Material Z in the project?
A. £500
B. £2,000
C. £8,000
D. £3,500