Answer
See answers below
Work Step by Step
We have:
$A=\begin{bmatrix}
4.5 & 6 & 2.5\\
5.5 & 8 & 2.5
\end{bmatrix}$
$B=\begin{bmatrix}
4 & 6.5 & 3.25\\
5 & 8.5 & 3.25
\end{bmatrix}$
To make each cost 10% higher:
$1.1A=1.1\begin{bmatrix}
4.5 & 6 & 2.5\\
5.5 & 8 & 2.5
\end{bmatrix}=\begin{bmatrix}
4.95 & 6.6 & 2.75\\
6.05 & 8.8 & 2.75
\end{bmatrix}$
$1.1B=1.1\begin{bmatrix}
4 & 6.5 & 3.25\\
5 & 8.5 & 3.25
\end{bmatrix}=\begin{bmatrix}
4.4 & 7.15 & 3.58\\
5.5 & 9.35 & 3.58
\end{bmatrix}$
