Sizu Home › Calculators › Daily, Hourly, Yearly and Doubling
Opens on Chapter 12’s example: Joaquin’s cups: $38 for a case of 250, or 17¢ each.
Per day, per hour, per year
Cost per use
The rule of 72
Enter your numbers, then press Calculate.
From the book, Chapter 12. $38 ÷ 250 = 15.2¢ a cup, 1.8¢ less than 17¢: $72 a month at 4,000 cups, $864 a year. $4.50 a day is $1,642.50 a year. $23 an hour × 2,000 hours is $46,000 ($47,840 for 2,080); $62,000 ÷ 2,000 is $31 an hour. $180 boots worn 200 days cost 90¢ a wear; $60 boots that last 50 days cost $1.20. At 6% a year, 72 ÷ 6 = 12 years to double (1.06¹² = 2.01; exactly 11.9).
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