Use the Data Given Below to Answer the Following Question(s)

Multiple Choice

Use the data given below to answer the following question(s) .
The table below shows the sales of a gaming console for the first 6 months of the year 2011.
The forecaster uses the weighted average model to determine the forecasts.He assumes a 40% weight for the most recent reading,30% weight for the second most recent reading,20% for the third most recent reading,and 10% for the fourth most recent reading.
-For the given data,the value of the mean absolute percentage error is ________.

A) 51.5
B) 26.95
C) 5.19
D) 21.03