(2.1) (18 points) Given the actual sales of an item in the past 8 months as in the table, calculate the 2-month average forecasts up to month 9, and forecast errors. Put the results in the table. (reminder: Place your moving-average results in the correct rows.) (Keep one digit after decimal point.

2. (40 points in total) (2.1) (18 points) Given the actual sales of an item in the past 8 months as in the table, calculate the 2-month moving average forecasts up to month 9, and forecast errors). Put the results in the table. (Reminder: Place your moving-average results in the correct rows.) (Keep one digits after decimal point.) Month 2-month moving average forecasts (n=2) |Forecast Errors 1 2 3 4 5 6 7 8 9 Actual sales ($) 720 840 750 980 650 820 760 780 Calculate MAD for the above moving average forecasts with n=2: MADo-2 =