Problem 3-23 (Algo) After using your forecasting model for six months, you decide to test it using a tracking signal. Here are the forecast and actual demands for the six-month period: ACTUAL 510 525 PERIOD May June July August September October FORECAST 420 470 520 625 645 695 410 510 670 610 a. Find the tracking signal. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.) a. Find the tracking signal. (Negative values should be indicated by a minus sign. Round your answers to 2 decimal places.) Answer is complete but not entirely correct. Period Tracking Signal May June July August September October 1.00 2.00 3.00 X 4.00 % 5.00 X 6.00