49. Steel Glass Wood

$C=\left[\begin{array}{rrr}13& 5& 38\\ 7& 2& 7\end{array}\right]\begin{array}{l}\text{Cost of material}\\ \text{Transportation cost}\end{array}$

51. $24,200

53.

1.   Chairman  President Vice president

   $\begin{array}{l}\text{Salary}\\ \text{Bonus}\\ \text{Stock}\end{array}\left[\begin{array}{rrr}2,500\text{,}000& 1,250\text{,}000& 100\text{,}000\\ 1,500\text{,}000& 750\text{,}000& 150\text{,}000\\ 50\text{,}000& 25\text{,}000& 5000\end{array}\right]$

2. $\left[\begin{array}{l}1\\ 1\\ 4\end{array}\right]\begin{array}{l}\text{Chairman}\\ \text{President}\\ \text{Vice president}\end{array}$

3. $\left[\begin{array}{r}4,150\text{,}000\\ 2,850\text{,}000\\ 95\text{,}000\end{array}\right]\begin{array}{l}\text{Total salary}\\ \text{Total bonuses}\\ \text{Total stocks}\end{array}$

55. $AD=\left[\begin{array}{rrrrrr}0& 4& 4& 1& 1& 0\\ 0& 0& -1& -1& -6& -6\end{array}\right]$

57. $AD=\left[\begin{array}{llllll}0& 4& 4& 1& 1& 0\\ 0& 1& 2& 1.25& 6.25& 6\end{array}\right]$

59.

61.

63. $A=\left[\begin{array}{ll}2& 0\\ 0& 1\end{array}\right]$

65. $A=\left[\begin{array}{ll}1& 2\\ 0& 1\end{array}\right]$