https://www.bartleby.com/solution-answer/chapter-136-problem-21p-practical-management-science-6th-edition/9781337671989/ed4a8b3b-9c09-11e9-8385-02ee952b546e
（*How to solve this question using the original Excel tool and functions without the StatTools Add-in?)
The file P13_21.xlsx contains the weekly sales of rakes at a hardware store for a two-year period. Use the moving averages method, with spans of your choice, to forecast sales for the next 30 weeks. Does this method appear to track sales well? If not, what might be the reason?
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