The Constraint for Resource 1 Is 5 X₁ + 4 $\le$

Multiple Choice

The constraint for resource 1 is 5 X₁ + 4 X₂ $\le$ 200. If X₁ = 20 and X₂ = 5, how much of resource 1 is unused?

A) 0
B) 80
C) 100
D) 200