1. Compute MAPE for each forecast. (Round your intermediate calculations to 6 decimal places and final answers to 4 decimal places.)

2. tracking signal at month 10, and 2s control limits. (Round your intermediate calculations and final answers to 2 decimal places.)

Two independent methods of forecasting based on judgment and experience have been prepared each month for the past 10 months. The forecasts and actual sales are as follows: Month 1 2. 3 4 5 6 7 8 9 . 10 Sales 770 789 794 780 768 772 760 775 786 790 Forecast 1. Forecast 2 771 769 785 787 790 792 784 798 770 774 768 770 761 759 771 775 784 788 788 788