400
First person to the board to draw a CORRECT production possibilities curve comparing Guns and Butter with point A for an allocative efficient point favoring Guns, point B for an unattainable point, and point C representing a point that shows the result of increased unemployment and inefficient resources.
Point "A" should be more towards whatever axis says "guns", point "B" should be outside the curve, and point "C" should be inside the curve.