Smarmy Sales, Inc. (SSI), sells herbal remedies through its Web site and through phone reps. Over the past six years, SSI has started to depend more and more on its Web site to generate sales. The figures below show total sales, phone rep costs, and Web site costs for the past six years:
a. Calculate productivity for the phone reps for each of the past six years. Interpret the results.
b. Calculate the productivity for the Web site for each of the past six years. Interpret the results.
c. Compare your results in parts a and b. What are the limitations of these single-factor productivity measures?
d. Now calculate a multifactor productivity score for each year, where the "input" is the total amount spent on both the phone reps and the Web site. Interpret the results. What can you conclude?

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ТOTAL PHONE REP WEB SITE YEAR SALES COSTS COSTS $4,790,000 $5,750,000 $6,900,000 $8,280,000 $9,930,000 $11,920,000 $200,000 $210,000 $221,000 $230,000 $245,000 $255,000 $50,000 $65,000 $85,000 $110,000 $145,000 $190,000 2008 2009 2010 2011 2012 2013