Given the demand and forecast values shown in the table below, Period Demand Forecast June 520 468 July 495 510 August 510 521 September 489 500 What is the forecasting value for October using 3-Month Weighted Moving Average, with a weight allocation of 0.50, 0.3 and 0.2, respectively? A. 508.3 B. 496.5 C.498.3 O D.511.3 Using the data above, the forecast error for July is O A.2 OB. 15 O C.-15 OD-2 Using the data above, the mean absolute deviation (MAD) at the end of September is O A. 15.28 O B.22.25 C.O OD. 27.19