(Figure: Profit Maximization) In the figure, the profit from selling three units is:
$\begin{array}{|c|c|c|c|c|}
\hline \text { Quantity } & \text { Price } & \begin{array}{c}
\text { Total } \
\text { Revenue }
\end{array} & \text { Total Cost } & \begin{array}{c}
\text { Marginal } \
\text { Cost }
\end{array} \
\hline 1 & \$ 9 & \$ 9 & \$ 12 & \$ 4 \
\hline 2 & 9 & 18 & 15 & 3 \
\hline 3 & 9 & 27 & 21 & 6 \
\hline 4 & 9 & 36 & 30 & 9 \
\hline 5 & 9 & 45 & 41 & 11 \
\hline
\end{array}$

Question

(Figure: Profit Maximization) In the figure, the profit from selling three units is:
 $\begin{array}{|c|c|c|c|c|}
\hline \text { Quantity } & \text { Price } & \begin{array}{c}
\text { Total } \
\text { Revenue }
\end{array} & \text { Total Cost } & \begin{array}{c}
\text { Marginal } \
\text { Cost }
\end{array} \
\hline 1 & \$ 9 & \$ 9 & \$ 12 & \$ 4 \
\hline 2 & 9 & 18 & 15 & 3 \
\hline 3 & 9 & 27 & 21 & 6 \
\hline 4 & 9 & 36 & 30 & 9 \
\hline 5 & 9 & 45 & 41 & 11 \
\hline
\end{array}$

Quizplus · Accepted Answer

Profit is calculated as total revenue minus total cost. For three units, the total revenue is $27 and the total cost is $21, making the profit $6.

(Figure: Profit Maximization) in the Figure, the Profit from Selling