If Labor Is Fixed at 5 Units,how Much Does the Second

Multiple Choice

If labor is fixed at 5 units,how much does the second unit of capital add to total output? $$\begin{array}{l}\quad\quad\quad\quad\quad \text { Units of Capital }\\\begin{array} { c c c c c } & & 1 & 2 & 3 \\ \text { Units } & 1 & 80 & 100 & 120 \\\text { of } & 2 & 180 & 220 & 260 \\\text { Labor } & 3 & 270 & 330 & 390 \\& 4 & 340 & 420 & 500 \\& 5 & 390 & 490 & 590 \\& 6 & 410 & 530 & 650\end{array}\end{array}$$ Amount of total output produced from various combinations of labor and capital.

A) 490
B) 390
C) 50
D) 100
E) none of the above