When the double extension approach to the dollar-value LIFO inventory cost flow method is used, the inventory layer added in the current year is multiplied by an index number.How would the following be used in the calculation of this index number? 
Definitions:
Industrial Production
The measure of output of the industrial sector of the economy, including manufacturing, mining, and utilities.
Foreign Consumers
Individuals or organizations located in one country who purchase goods or services produced in a different country.
Industrial Policy
A strategic effort by a government to encourage the development and growth of specific sectors or industries within the economy.
Economic Development
The process by which a nation improves the economic, political, and social well-being of its people, typically seen through increases in income, education, and health.
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