The Ultra Ski Shop rents snow skis during the ski season and employs five people. The owner wants to track productivity performance measures using the data shown below. Determine the single-factor productivities and multiple-factor productivities for the two years. Discuss potential problems that you find.

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Inputs and Outputs 2014 $66,000 Skis rental revenue Labor cost $10,800 $24,000 Lease payments Inputs and Outputs 2015 $69,500 Skis rental revenue $11,600 Labor cost Lease payments $24,500