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Use Holt - Winter s multiplicative method to create a seasonal model that minimizes the MSE for the data set. Use Solver to determine the

Use Holt-Winters multiplicative method to create a seasonal model that minimizes the MSE for the data set. Use Solver to determine the optimal values of alpha, beta, and gamma. You can initialize these values to 0.
a. What are the optimal values of alpha, beta, and gamma?
b. What are the forecasts for each of the next 6 months using this technique? Year Month Time Period COGS
11121637
2225506
3326594
4421933
5523117
6626979
7728337
8828926
9925015
101028196
111124170
121225004
211324575
21435848
31535217
41632759
51736542
61836109
71940279
82037816
92136338
102237814
112339359
122434151
312539862
22650664
32748533
42845382
52943981
63041276
73144284
83246920
93347469
103443187

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