Price of raw material = US$ 1 000/t tuna (from Appendix C2) Cost of Fish = Amount raw material (t tuna/day) x Price (US$/t tuna) = 1 t tuna/day x US$ 1 000/t tuna = US$ 1 000/day Oil . Amount of oil = 80 kg oil/day (from Example 2.5) Price of oil = US$ 0.51kg oil (from Appendix C2)