... on farms are in or out of the labor force; and then ask whether they are if they don’t work outside the home, but cook, make and wash clothing, and otherwise maintain the household for a family... each month The CPI for the month equals y e 100 multiplied by the ratio of the cost in the Book $30 $60 current month to the cost in the base s period Coffe 20 $2 $40 For example, suppose the initial... between the base e percent period and the current period, the CPI has risen by 30 Measuring the Inflation Rate  The inflation rate is the percentage change in the price level from one year to the