thevprice of three commodities A,B and C in a shop are Rs . 10, 20 and 30 respectively .A man x buys 8 units of A ,7 units of B and 6 units of C .A man Y buys 6 units of A ,7 units of B and 8 units of C show in matrix notation ,the price of the commodities ,quantities bought and amount spent ??
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