step 1: (a)Matrix for the products x,y,z is \[ \begin{array} { c c } x & y & z \\ 10,000 & 2,000 & 18,000 \\ 6,000 & 20,000 & 8,000 \end{array} \]

Matrix corresponding to sale price of each product\[\begin{array}{1 1}x\\y\\z\end{array}\begin{bmatrix}2.50\\1.50\\1.00\end{bmatrix}\]

The revenue collected by the market is given by\[\begin{bmatrix}10000 & 2000 & 18000\\6000 & 20000 & 8000\end{bmatrix}\begin{bmatrix}2.50\\1.50\\1.00\end{bmatrix}\]

Step 2: Multiply each row with the column

$\begin{bmatrix}25000+3000+18000\\15000+30000+8000\end{bmatrix}$

$\begin{bmatrix}46000\\53000\end{bmatrix}$

Thus Revenue in each market is Rs 46000 and 53000.

Total Revenue=46000+53000=Rs 99000