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Economists often look at retail sales data to gauge the state of the economy. This is...

Economists often look at retail sales data to gauge the state of the economy. This is especially so in a recession year, when consumer spending has decreased. Consider the following table, which shows U.S. monthly nominal retail sales for 2009. Sales are measured in millions of dollars and have been seasonally adjusted. Also included in the table is the corresponding producer price index (PPI) for 2009. Month Sales PPI Month Sales PPI January 339,453 171.3 July 341,568 172.0 February 341,371 171.1 August 349,899 174.3 March 338,205 169.6 September 342,752 173.3 April 337,389 170.8 October 346,691 174.0 May 338,934 170.8 November 353,535 176.4 June 341,992 173.9 December 352,858 177.3 a. How many times were nominal sales below that of the previous month? b-1. Use the PPI to compute sales in real terms. (Round your answers to 2 decimal places.) b-1. Use the PPI to compute sales in real terms. (Round your answers to 2 decimal places.)

month. real sales

How many times were real sales below that of the previous month?

Compute the total percentage increase in nominal as well as real retail sales in 2009. (Round your answers to 2 decimal places.)

Can economists feel optimistic about the economy based on the retail sales data?

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