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Holt's seasonal forecast with multiplicative seasonal indices

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** Please see the attached file for the complete problem description **

I have a table showing Holt's seasonal forecast with multiplicative seasonal indices. In this model, beta is twice the value of alpha, the seasonal indices average to 1 and the seasonal factors for quarter 1 and quarter 3 are both equal to 1.

Please complete the table.

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This solution provides a tutorial for how to complete the given table in Excel.

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