Table 131 A Monopoly Producer of Foreign Language Translation Software Faces a \begin{array}{c}
\text

Table 13.1
$\begin{array}{|c|c|c|}\hline \text { Price per Unit } & \begin{array}{c}\text { Quantity } \\\text { Demanded } \\\text { (units) }\end{array} & \begin{array}{c}\text { Total Cost of } \\\text { Production } \\\text { (dollars) }\end{array} \\\hline \$ 85 & 10 & \$ 530 \\\hline 80 & 11 & 540 \\\hline 75 & 12 & 550 \\\hline 70 & 13 & 560 \\\hline 65 & 14 & 575 \\\hline 60 & 15 & 595 \\\hline 55 & 16 & 625 \\\hline\end{array}$
A monopoly producer of foreign language translation software faces a demand and cost structure as given in Table 13.1.
-Refer to Table 13.1.What is the marginal revenue from the sale of the 12th unit?

A) $75
B) $50
C) $20
D) -$5