To determine the net requirement for c, we determine first the number of c’s that are required for the production of a and b given that there are already 25 units of b available.
Number of c needed = (50 units of a)(2 c/unit of a) + (60 – 25 units of b)(5 c/unit of b)
Number of c needed = 275 c’s
There are currently 160 units of c; hence,
Net requirement for c = 275 c – 160 c
Net requirement for c = 115
Answer: 115