-28 Sales of industrial vacuum cleaners at R. Lowenthal Supply Co. over the past 13 months are as follows: (a) Using a moving average with three periods, determine the demand for vacuum cleaners for next February. (b) 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 . Sales of industrial vacuum cleaners at R. Lowenthal Supply Co. over the past 13 months are as follows: (a) Using a moving average with three periods, determine the demand for vacuum cleaners for next February. (b) 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