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Opens on Chapter 16’s example: two packs of paper towels, and two car swaps measured in gallons.
Offer A
Offer B
Fuel: gallons, not miles per gallon
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From the book, Chapter 16. Per roll, the 36-pack wins (45.8¢ against 50.0¢); per 100 sheets the 24-pack wins (25.0¢ against 30.5¢), because its rolls hold more: 4,800 sheets against 5,400. The per-sheet loser costs 22% more. Over 1,000 miles, going from 12 to 15 mpg saves 16 2/3 gallons (83 1/3 down to 66 2/3); going from 30 to 40 mpg saves only 8 1/3.
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