Two classes order exercise books and folders. Their quantity matrix is \(Q=\begin{pmatrix}20&12\ 15

Question

Two classes order exercise books and folders. Their quantity matrix is $Q=\begin{pmatrix}20&12\ 15&18\end{pmatrix}$, with rows Class A, Class B and columns books, folders. The unit-price matrix, in dollars, is $P=\begin{pmatrix}2&2.2\ 1.5&1.2\end{pmatrix}$, with rows books, folders and columns Supplier X, Supplier Y. There are no other charges. Calculate $QP$.[3] Which supplier is cheaper for each class, and by how much?[2]

Accepted Answer

(a) $\begin{pmatrix}58&58.4\ 57&54.6\end{pmatrix}$ (b) Class A: X by $\$0.40$; Class B: Y by $\$2.40$.

Comparing supplier costs

Comparing supplier costs

Solution:

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