15. a. Use double exponential smoothing to forecast sales with an a of 0.20, a B of...

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15.

a. Use double exponential smoothing to forecast sales with an a of 0.20, a B of 0.40, an initial base of 59.0, and a trend of 1.0.

b. At each period calculate the MAD based on the data available up to and including that period.

c. At each period, calculate the tracking signal based on data up to and including that period.

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