The following table shows predicted product demand using your particular forecasting method along with the actual demand that occurred:

FORECAST ACTUAL
1,515 1,585
1,415 1,515
1,715 1,615
1,755 1,680
1,805 1,730
Compute the tracking signal using the mean absolute deviation and running sum of forecast errors.

Note: Negative values should be indicated by a minus sign. Round your "Mean Absolute Deviation", "Tracking Signal" to 2 decimal places and all other answers to the nearest whole number.