Three shopkeepers \( A, B \) and \( C \) go to a store to buy stati...

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Three shopkeepers \( A, B \) and \( C \) go to a store to buy stationary. \( A \) purchases 12 dozen notebooks, 5 dozen pens and 6 dozen pencils. \( B \) purchases 10 dozen notebooks, 6 dozen pens and 7 dozen pencils. \( C \) purchases 11 dozen notebooks, 13 dozen pens and 8 dozen pencils. A notebook costs 40 paise, a pen costs \( ₹ 1.25 \) and a pencil costs 35 paise. Use matrix multiplication to calculate each individual's bill.
\( \mathrm{P} \)
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