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Holt-Winters method forecasting problem

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3-25. The number of cases of merlot wine sold by a Paso Robles winery in an 8-year period follows:

Year Cases of Wine
1991 270
1992 365
1993 389
1994 456
1995 358
1996 500
1997 410
1998 376

Referring to the Table above, the Holt-Winters method for forecasting with smoothing constant of 0.2 for both level and trend will be used to smooth the wine sales. The smoothed values of the level and trend for 1993 are _________ and ________, respectively.

a. 356 and 86
b. 406.8 and 57.84
c. 398 and 61.25
d. 374.8 and 76.5

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This posting contains solution to following forecasting problem on Holt-Winters method(Exponential smoothing with trend).

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