Suppose the Domestic Supply (Q^S) and Demand (Q^D) for Skateboards $$\begin{array} { l } Q ^ { S } = - 60 + 3 P \\Q ^ { D } = 390 - 2 P\end{array}$$

Multiple Choice

Suppose the domestic supply (Q^S) and demand (Q^D) for skateboards in the United States are given by the following set of equations: $$\begin{array} { l } Q ^ { S } = - 60 + 3 P \\Q ^ { D } = 390 - 2 P\end{array}$$ In the absence of international trade in skateboards how many skateboards will be sold in the United States?

A) 138
B) 258
C) 210
D) 930