In January, the Left Coast Bookstore Chain Sold 900 Hardcover

Essay

In January, the Left Coast Bookstore chain sold 900 hardcover books, 1,200 softcover books, and 1,600 plastic books in San Francisco; it sold 600 hardcover, 500 softcover, and 700 plastic books in Los Angeles. Hardcover books sell for $34 each, softcover books sell for $8 each, and plastic books sell for $14 each. $$\begin{array} { | l | l | l | l | } \hline & \text { Hard } & \text { Soft } & \text { Plastic } \\\hline \text { San Francisco } & 900 & 1,200 & 1,600 \\\hline \text { Los Angeles } & 600 & 500 & 700 \\\hline\end{array}$$ ​
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.
Please enter your answer as a $2 \times 1$ column matrix in the following form: $\left[ \begin{array} { l l l l } \text { San Francisco Profit}\\ \text {Los Angeles Profit }\\\end{array} \right]$ ​ $900$