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(a) A shopkeeper makes a profit of Sh 200 by selling 20 blankets and 50 towels. He makes a loss of Sh 7 if he sells 35 blankets and 28 towels of the same kind. Determine the profit (or loss) on each of the two items sold.
(b) If he sold 12 blankets, find the number of towels he should sell to realize an overall profit of Sh 3012.