-Refer to the Following Table

$\begin{array}{lllllll}&\text { Total Fixed } & \text { Total Variable } & & \text { Average } & \text { Average Variable} & \text { Average }&\text { Marginal } \\\text { Output }&\text { Cost } & \text { Cost } & \text { Total Cost } & \text { Fixed Cost } & \text { Cost } & \text { Total Cost } & \text { Cost }\\1&-&-&-&-&-&-&-\\2&-&-&\$600&-&-&-&-\\3&-&-&-&-&???&-&\$20\\4&-&\$440&-&-&-&-&-\\5&\$500&-&-&-&-&-&-\end{array}$
-Refer to the following table. What is the average variable cost of producing three (3) units of the good?

A) $80
B) $120
C) $40
D) $20
E) $420