The difference between the actual demand and the forecast is called the

Group of answer choices

Running Sum of The Forecasting Error

Mean Absolute Percent Error

Error

Standard Deviation of the Forecast Error

Period Demand

$1500$

$2490$

$3650$

$4550$

$5575$

$6$

Using a Weighted Moving Average $(4,3,2,1),$ create a forecast for period $6$