Forecasting Method: (Simple) Exponential Smoothing with a=0.3. Using this method, please forecast weekly auto sales from week 5 to 8.

Week Demand(D) Average(A) Forecast(F)

1 100 A₁=(0.3)100+(1-0.3)110+107 F₁=110

2 150 A₂=(0.3)150+(1-0.3)107=119.90 F₂=107

3 130 A₃=(0.3)130+(1-0.3)119.90=122.93 F₃=119.90

4 140 A₄=(0.3)140+(1-0.3)122.93=128.05 F₄=122.93

5 120 F₅=128.05

6 110

7 100

8