Problem 2 (20 points). A known brand of running tennis had the following sales in units) history during the last two years and appear to exhibit some trend: Year 2 140 81 Month Year 1 Year 2 Month Year 1 Jan 11 15 Jan 113 Feb 17 14 Feb 92 Mar 35 41 Mar 64 Apr 58 49 Apr 44 May 78 85 May 24 Jun 135 157 Jun 21 53 47 15 24 a. (10 points). Determine the seasonal factors for each month. Show all calculations. b. (4 points). From previous questions; Which period has the sales behavior closest to average sales? Support your answer. C. (6 points). The store's owner expects a total sale of 800 tennis for Year 3. Calculate the forecast for each month. Show all calculations.
