The Zocor Company is interested in forecasting period 13 sales for a product.It has 12 months of historical data.The following shows the data and the forecasted values for periods 1-12 using a single exponential smoothing model with a smoothing constant value equal to 0.20. 
What is the forecast bias value for the model over periods 2-12?
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Dan Edelman
A pioneer in public relations who founded the firm Edelman, known for innovative PR strategies and global outreach.
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Moss Kendrix
An influential American public relations professional who played a pivotal role in changing how corporations interacted with African American consumers.
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