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a. Given :alpha =beta=0.05
In double exponential smoothing ,
Forecast for next month t =Forecastt-1 +Trendt-1
Given : Forecast for next month =215000 and trend of month 0 =50000
So, Forecast of month 0 =Forecast of next month-trend =215000-50000=165000
i,e In excel ,
C5=0.05*B5+0.95*(C4+D4)
(drag this cell formula for the rest of the months)
D5=0.05*(C5-C4)+0.95*D4
(Drag this cell formula for the rest of the months)
E5=C4+D4
(Drag this cell formula for the rest of the months)
Calculations are as shown in the below excel snapshot :
b. From the snapshot above,
Month 7's forecast =Forecast including trend=519273.33
My App is a small but growing start-up that sees demand for several of its apps...
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