Month Demand Forecast Actual Demand September 2021 3,200 3,400 October 2021 3,300 3,100 November 2021 3,200 3,600 December 2021 3,400 4,000 January 2022 3,600 3,400 February 2022 3,500 3,300 March 2022 3,400 2,600 What is the mean absolute deviation (MAD) over the six-month period? What is the running sum of forecast errors (RSFE) over the six-month period? What is the Tracking Signal value for the forecasts of this important product over the six-month period? And given this product is deemed as high-volume (and high-value), would the Tracking Signal as estimated for the six-month period be generally acceptable?