Find a Matrix a and a Column Matrix B That $$\mathrm { AB } = \left[ \begin{array} { r } 960 \\810 \\1011\end{array} \right]$$

Multiple Choice

Find a matrix A and a column matrix B that describe the following tables involving credits and tuition costs. Find the
matrix product AB, and interpret the significance of the entries of this product.
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A)
$$\mathrm { AB } = \left[ \begin{array} { r } 960 \\810 \\1011\end{array} \right]$$
Tuition for Student 1 is $\$ 960$ , tuition for Student 2 is $\$ 810$ , and tuition for Student 3 is $\$ 1011$ .
B)
$\mathrm { AB } = [ 63 ]$
The average cost per credit hour is $\$ 63$ .
C)
$$\mathrm { AB } = \left[ \begin{array} { r } 1074 \\981 \\726\end{array} \right]$$
Tuition for Student 1 is $\$ 1074$ , tuition for Student 2 is $\$ 981$ , and tuition for Student 3 is $\$ 726$ .
D)
$$\mathrm { AB } = \left[ \begin{array} { r } 789 \\1095 \\897\end{array} \right]$$
Tuition for Student 1 is $\$ 789$ , tuition for Student 2 is $\$ 1095$ , and tuition for Student 3 is $\$ 897$ .