Table 13-8
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​ -Refer to Table 13-8

Table 13-8
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$$\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Output } \\\text { (Units) }\end{array} & \begin{array} { c } \text { Fixed Cost } \\\text { (Dollars) }\end{array} & \begin{array} { c } \text { Variable Cost } \\\text { (Dollars) }\end{array} \\\hline 0 & 20 & 0 \\\hline 1 & 20 & 10 \\\hline 2 & 20 & 40 \\\hline 3 & 20 & 80 \\\hline 4 & 20 & 130 \\\hline 5 & 20 & 200 \\\hline 6 & 20 & 300 \\\hline\end{array}$$
-Refer to Table 13-8. What is the shape of the marginal cost curve for this firm?

A) constant
B) upward-sloping
C) downward-sloping
D) U-shaped