Business mathematic

Amina, Usman who is a merchant dealer in Yobe state deals in
three products namely Gold, Ball pen and Diamond. In her book
of account were found sales for the month of August 2002 in the
following order.
3 Gold, 5 Ball pens and 6 Diamond were sold at Damaturu.
5 Gold, 7 Ball pens and 4 Diamond were sold in Potiskum
Total products sold at Gashua were in the ratio 1: 2: 2 for God,
Ball pen and Diamond respectively.
If the sales in Damaturu summed up to N6, 000, that of Potiskum
summed up to N7, 000and that of Gashua summed up to N6, 000.
Required
(i) Present the information using matrix algebra.
(ii) At what rate was each product sold.

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