12. The following table represents sales data for pounds of butter (in hundreds) sold by a supermarket.

a. Use single exponential smoothing to forecast demand, with an of 0.20 and an initial forecast of 100.0.

b. Calculate the single exponential smoothed forecast, using an a of 0.30 and an initial forecast of 100.0.

c. Calculate the MAD for both forecasts. (Use all 12 months of data.)

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MONTH SALES MONTH SALES 1 85 7 88 23456 115 8 127 83 9 126 126 10 125 114 11 110 87 12 89