The price of a book was $400. If the book's price is decreased by 15% and then increased by 40%, what is the final price of the book? Give the rationale and then the answer.
Let's think step by step. When the price of the book is decreased by 15%, the total price decrease is 15 / 100 * $400 = $60. The new price of the book becomes $400 - $60 = $340. The price of the book is then increased by 40 / 100 * 340 = $136. The final price of the book is $340 + $136 = $476.. The answer is: 476.

Stella’s antique shop has 3 dolls, 2 clocks and 5 glasses for sale. She sells the dolls for $5 each. The clocks are priced at $15 each. The glasses are priced at $4 each. If she spent $40 to buy everything and she sells all of her merchandise, how much profit will she make? Give the rationale and then the answer.
Let's think step by step. The dolls will sell for 3 * $5 = $15. The clocks will bring in 2 * $15 = $30. The glasses will sell for 5 * $4 = $20. In total, she will bring in $15 + $30 + $20 = $65. Her total profit will be $65 - $40 = $25.. The answer is: 25.

Mom went shopping at the market. She left with €55. She bought 2 packs of bananas for €4 each, pears for €2, asparagus for €6 and finally a chicken for €11. How much money does Mom have left? Give the rationale and then the answer.
Let's think step by step. Mom bought things that cost: 4 + 4 + 2 + 6 + 11 = €27 . So she has 55 – 27 = €28 left.. The answer is: 28.