Question: a. Using the information above: first caclulate the error in period 4 and then calculate the Cumulative Forecast Error (CFE) of the past 3 periods.

a. Using the information above: first caclulate

a. Using the information above: first caclulate the error in period 4 and then calculate the Cumulative Forecast Error (CFE) of the past 3 periods.

b. Using the information above: first caclulate the error in period 4 and then calculate the Mean Absolute Deviation (MAD) of the past 4 periods.

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