A B C D E F G H Abs. % Error Instruction: Use the data below to calculate RSFE, MAD, MSE, MAPE, and Tracking Signal. 1 2 3 Period Actual Dema Forecast Error Absolute Error Error^2 4 1 1,800 1,586 5 2 2,200 1,855 6 3 2,000 2,124 7 1,400 2,394 8 5 2,500 2,663 9 6 3,700 2,932 10 7 3,200 3,201 11 8 3,100 3,471 12 9 3,800 3,740 13 10 4,600 4,009 14 11 4,200 4,278 15 12 4,300 4,547 16 17 Total 18 19 20 RSFE MAD MSE MAPE Tracking Signal=RSFE/MAD