The cooperative stores of a particular school has 10 dozen physics books,

Stock of various types of books in the store is given by

Selling price of various types of books in the store is given by

$Y=\left[\begin{array}{l}8.30 \\ 3.45 \\ 4.50\end{array}\right] \begin{gathered}\text { Physics } \\ \text { Chemistry } \\ \text { Mathematics }\end{gathered}$

Total amount received by the store from selling all the items is given by

$X Y=\left[\begin{array}{lll}120 & 96 & 60\end{array}\right]\left[\begin{array}{l}8.30 \\ 3.45 \\ 4.50\end{array}\right]$

$=[(120)(8.30)+(96)(3.45)+(60)(4.50)]$

$=[996+331.20+270]$

$=[1597.20]$

Required amount = Rs 1597.20