A fales manager wants to forecast monthly sales of the machines the company makes using the following monthly sales data. Use the information in the table above. Forecast the monthly sales of the machine for month 9 , using the three-month moving-average method. Use the information in the table above. Use the 3-month weighted moving-average method to calculate the forecast for month 9 . The weights are 0.60,0.30, and 0.10 , where 0.60 refers to the most recent demand. Use the information in the table above. Use an exponential smoothing model with a smoothing parameter of 0.30 and an April forecast of 525 to determine what the forecast sales would have been for June