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4. Andy purchased 120 pencils at the rate of $2 per, pencil. He sold 72 of them at the rate of $2.5 per pencil, and the remaining at the rate of $2 per pencil. Find his, profit or loss per cent., , 5. Mike sold two horses for $18000 each. On one he, gained 20% and on the other he lost 20%. Find his total, gain or loss., , 6. A television set was bought for $3900. $200 was, spent on transportation and $900 on repair. It was sold, at a loss of 10%. Find the S.P. of television., , 7. A bed sheet was sold for $483 thereby gaining 15%., Find the C.P. of the bed sheet., , 8. Aaron bought an almirah for $1520 and sold it at a, profit of 12 '/, %. Find the selling price of the almirah., , 9. By selling a camera for $2400, Ron loses 4%. At what, price must he sell it to gain 12 %., , 10. By selling a stool for $240 a carpenter loses 20%., How much per cent would he gain or lose by selling it for, $360?, , 11. The selling price of 12 eggs is equal to the cost price, of 15 eggs. Find the gain per cent., , 12. The cost price of 10 bananas is equal to the S.P. of, 12 bananas. Find the loss per cent.