Question: The attached data set contains historical sales data for a retailer. Fit an exponential smoothing model with a smoothing contant of .4. What is the

The attached data set contains historical sales data for a retailer. Fit an exponential smoothing model with a smoothing contant of .4. What is the forecast for period 21? Enter you answer as a whole number.

Period Demand

1 2608

2 2702

3 2626

4 2746

5 2807

6 2703

7 2827

8 2863

9 2803

10 2940

11 2927

12 2919

13 2963

14 2863

15 2899

16 2972

17 3052

18 3069

19 3093

20 3150

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