Given that the MAD for the following forecast is 2.5, what is the actual value in period 2? Period 1: Forecast=100 Actual=95 Period 2: Forecast=110 Actual=? Period 3: Forecast=120 Actual=123 Period 4: Forecast=130 Actual=130 Solution 2.5=1/4*(5+110-x+3+0) x=110-2 x=108.