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Refer to the following table which contains the sales (in $,000) for a department store for the first ten months of the year.

Month Sales
January 440
February 480
March 590
April 400
May 500
June 550
July 470
August 500
September 600
October 520

Using a three period moving average [i.e. MA(3)] as a forecasting method, what is the MSE for this forecasting model?

Using a simple exponential smoothing (with a smoothing constant of 0.2) as a forecasting method, what is the MAPE for this forecast model ________ % ?

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