Chapter 9.3, Problem 71PE

To determine

To calculate: The $NP$ , where $P$ matrix is the unit price of the items and $N$ matrix is the number of units of every item sold,

$\begin{array}{l}\text{Lemonade Soda Water Tea}\\ N=\left[\begin{array}{cccc}150& 270& 440& 80\end{array}\right]\end{array}$

And,

$P=\left[\begin{array}{c}\$2.50\\ \$1.50\\ \$2.00\\ \$2.00\end{array}\right]\begin{array}{c}\text{Lemonade}\\ \text{Soda}\\ \text{Water}\\ \text{Tea}\end{array}$ .