The Supply and Demand Schedules for Dozens of Roses Are

The supply and demand schedules for dozens of roses are given below: $$\begin{array}{l}\begin{array} { | l | l | l | } \hline \text { Price } & \begin{array} { l } \text { Quantity Supplied per } \\\text { period }\end{array} & \begin{array} { l } \text { Quantity Demanded per } \\\text { period }\end{array} \\\hline \$ 10 & 200 & 500 \\\hline \$ 20 & 300 & 450 \\\hline \$ 30 & 400 & 400 \\\hline \$ 40 & 500 & 350 \\\hline \$ 50 & 600 & 300 \\\hline\end{array}\\\text { TABLE 3- } 1\end{array}$$
-Refer to Table 3- 1. How many dozens of roses would actually be purchased if the price in this market were $10?

A) 500
B) 300
C) 400
D) 350
E) 200