Meaning - Two Matrices, Multiplication and Value to Location

Question

Matrix A shows the cups sold of 4 drinks at 2 cafes. Matrix B shows the revenue and cost per drink. Which cafe had a total revenue of 98?

$$A = \left[ {\begin{array} {cccc} 4 & 7 & 1 & 8 \ 6 & 3 & 5 & 9 \end{array}  } ight] \qquad B = \left[ {\begin{array} {cc} 4 & 9 \ 8 & 6 \ 1 & 7 \ 5 & 3 \end{array}  } ight] \qquad AB = \left[ {\begin{array} {cc} 113 & 109 \ 98 & 134 \end{array}  } ight]$$

Accepted Answer

Cafe 2

Answer

Cafe 1

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Meaning - Two Matrices, Multiplication and Value to Location