In January, the Left Coast Bookstore Chain Sold 600 Hardcover

In January, the Left Coast Bookstore chain sold 600 hardcover books, 1,100 softcover books, and 1,700 plastic books in San Francisco; it sold 300 hardcover, 100 softcover, and 200 plastic books in Los Angeles. Hardcover books sell for $26 each, softcover books sell for $8 each, and plastic books sell for $15 each. $$\begin{array} { | l | l | l | l | } \hline & \text { Hard } & \text { Soft } & \text { Plastic } \\\hline \text { San Francisco } & 600 & 1,100 & 1,700 \\\hline \text { Los Angeles } & 300 & 100 & 200 \\\hline\end{array}$$ Suppose that each hardcover book costs the stores $10, each softcover book costs $5, and each plastic book costs $10.
Use matrix operations to compute the the total profit at each store in January.

A) $\left[ \begin{array} { l } \$ 21,385 \\\$ 6,085\end{array} \right]$
B) $\left[ \begin{array} { l } \$ 21,400 \\\$ 6,100\end{array} \right]$
C) $\left[ \begin{array} { l } \$ 21,390 \\\$ 21,430\end{array} \right]$
D) $\left[ \begin{array} { l } \$ 21,430 \\\$ 6,070\end{array} \right]$
E) $\left[ \begin{array} { l } \$ 49,900 \\\$ 11,600\end{array} \right]$