A special-purpose index is to be designed to monitor the overall economy of the Southwest. Four key series were selected. After considerable deliberation, it was decided to weight retail sales 20%, total bank deposits 10%, industrial production in the area 40%, and nonagricultural employment 30%. The data for 1996 and 2013 are:

Construct a special-purpose index for 2013 using 1996 as the base period andinterpret.

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Year 1996 2013 Retail Sales ($millions) 1,159.0 ,971.0 Bank Deposits ($ billions) 87 91 Industrial Production (1990 = 100) 110.6 14.7 Employment 1,214,000 1,501,000