Assume that your stock of sales merchandise is maintained based on the forecast demand. If the distributor's sales personnel call on the first day of each month, compute your forecast sales by each of the three methods requested here ACTUAL June 142 July 182 August 12 a. Using a simple three-month moving average, what is the forecast for September? (Round your answer to 2 decimal places.) Forecast for Setar b. Using a weighted moving average. what is the forecast for September with weights of 0.40 0.50 and 0 10 for June July, and August, respectively? (Do not round intermediate calculations. Round your answer to 2 decimal pinces) c. Using single exponentia ong and assuming that the forecast for une had been 120 forecast sales for September with a moothing constant of 30. Do not round Intermediate calculations. Round your answer to 2 decimal places)