Table 85 -Refer to Table 8

Multiple Choice

Table 8.5
$$\begin{array} { | c | c | c | } \hline \begin{array} { c } \text { Quantity } \\\text { of Output }\end{array} & \begin{array} { c } \text { Total } \\\text { Revenue } ( \$ ) \end{array} & \begin{array} { c } \text { Total } \\\text { Cost } ( \$ ) \end{array} \\\hline 0 & 0 & 50 \\\hline 10 & 50 & 70 \\\hline 20 & 100 & 90 \\\hline 30 & 150 & 120 \\\hline 40 & 200 & 200 \\\hline 50 & 250 & 325 \\\hline\end{array}$$
-Refer to Table 8.5,which shows the output supplied by a firm,its total revenue,and its total cost of production.What is the profit-maximizing output?

A) 10 units
B) 20 units
C) 30 units
D) 40 units
E) 50 units