In January, the Left Coast Bookstore Chain Sold 600 Hardcover

Multiple Choice

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) $\left[ \begin{array} { l } \$ 49,900 \\\$ 11,600\end{array} \right]$