Using a moving average with three periods, determine the demand for vacuum cleaners for next February.

Using a weighted moving average with three periods, determine the demand for vacuum cleaners for February. Use $3,2,$ and $1$ for the weights of the most recent, second most recent, and third most recent periods, respectively. For example, if you were forecasting the demand for February, November would have a weight of $1,$ December would have a weight of $2,$ and January would have a weight of $3.$

Using MAD, determine which is the better forecast.

What other factors might Parker consider in forecasting sales?