Answer :
Here we consider the types of items sold along the column and the store in which they are stored along the rows
Thus week 1 and week 2 matrices can be written as
W1 = and W2 =
The sum of the items sold in two weeks is the sum of the above two matrices, which is sum of each corresponding elements of the two matrices
W1 + W2 =
⇒
TV DVD video CD
⇒ The sum of items sold in two weeks =
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