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Opens on Chapter 14’s example: a $120 coat at 40% off, plus an extra 25% off at the register.
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From the book, Chapter 14. 40% off and then 25% off takes a $120 coat to $54: 55% off, not 65% (which would be $42). $80 with 20% off and 7.25% tax is $68.64 in either order; a $10 coupon before the 20% gives $56, after it $54. 3% a year for 10 years is × 1.344: rent of $1,522.50 becomes $2,046.11. A $24,000 car losing 15% a year is worth $14,739 after three years (61.4%).
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