Using Matrices to Represent, Manipulate Data Practice Test

A small café tracks how many sandwiches and salads it has in stock at two locations. Rows represent items (row 1 = Sandwiches, row 2 = Salads) and columns represent locations (column 1 = Downtown, column 2 = Uptown). Inventory matrix $A$ (in units) is

$$A=\begin{bmatrix}20 & 30\\ 15 & 25\end{bmatrix}$$

Units sold during the day are in matrix $B$ (in units):

$$B=\begin{bmatrix}5 & 10\\ 10 & 15\end{bmatrix}$$

Based on the matrices, what does the matrix $A-B$ represent in this context?​

A small café tracks how many sandwiches and salads it has in stock at two locations. Rows represent items (row 1 = Sandwiches, row 2 = Salads) and columns represent locations (column 1 = Downtown, column 2 = Uptown). Inventory matrix $A$ (in units) is

$$A=\begin{bmatrix}20 & 30\\ 15 & 25\end{bmatrix}$$

Units sold during the day are in matrix $B$ (in units):

$$B=\begin{bmatrix}5 & 10\\ 10 & 15\end{bmatrix}$$

Based on the matrices, what does the matrix $A-B$ represent in this context?