A distributor records the weekly sales of personal computers (PCs) in three retail outlets in different parts of the country. The cost price of each model is: Pentium (basic) £480,             Pentium (extra) £600,                         Pentium (Latest) £1020 Number of computers sold in each shop:     Pentium (Basic) Pentium (Extra) Pentium (Latest) Shop A 150 320 180 Shop B 170 420 190 Shop C 201 63 58   The total weekly revenue for each shop is: Shop A £604,400    Shop B £642,300        Shop C £267,190 Use matrix multiplication to calculate: The total weekly cost of computers to each shop. The total weekly profit for each shop. Which shop makes the greatest overall profit?

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Matrices

‘Matrices’ is the plural form of the word matrix, and it is basically a spreadsheet in the form of a box. In mathematics, various functions can be carried out with matrices. Generally, a matrix comes in the shape of a square or rectangle. The elements are distributed horizontally in the form of rows, and vertically in the form of columns.