21.   The indexes are calculated by subtracting the number of respondents who say manufacturing or prices are rising from the number who say they are falling.

22.   The manufacturing index is calculated by subtracting the percentage of respondents who expect a decrease in production, orders, and other components from those looking for an increase.

23.   The indexes are calculated by subtracting the number of respondents who say manufacturing activity or prices are falling from the number who say they are rising.

24.   The indexes are calculated by subtracting the number of respondents who say production or prices are falling from the number who say they are rising.

25.   The key business outlook index is calculated by subtracting the latter from the former.

26.   The manufacturing index is calculated by subtracting the percentage of respondents who expect a decrease in production, orders and other components from the percentage looking for an increase.

27.   The manufacturing index is calculated by subtracting the percentage of respondents who expect a decrease in production, orders and other components from those looking for an increase.

28.   The number is calculated by subtracting the percentage of those whose outlook on the economy is negative from the percentage of those whose view is positive.

29.   The sentiment indexes are calculated by subtracting the percentage of those who feel pessimistic about the economy from those who are optimistic.

30.   The theoretical demand for OPEC oil is calculated by subtracting non-OPEC production from total world demand.