Given the data, what is the average forecast error (i.e., mean bias) if you use a 3-period weighted moving average to complete the forecast table? In this case, the weights are 0.5, 0.375, and 0.125 with the highest weight being attributed to the most recent data.

Month	Sales ($)
January	3,000
February	3,400
March	3,700
April	4,100
May	4,700
June	5,700
July	6,300
August	7,200
September	6,400
October	4,600
November	4,200
December	3,900

Using the same data from the previous question, what is the mean absolute deviation (MAD) for the data using the 3-period weighted moving average?

Using the same data from the first question, what is the mean absolute percent error (MAPE) for the data using the 3-period moving average? For this case, enter your percentage as a whole number (e.g., 12 as opposed to 12% or 0.12)?