Use an ? of 0.1 and a B (beta) of 0.2 to make a forecast for july and august. Calculate the MAD for your january through june forecasts. 15 demand units for January, 18 for february, 22 for march, 23 for april, 27 for May, 26 for june.
Months Demand, units
January 15
February 18
March 22
April 23
May 27
June 26