The following sales data are available for 2003-2008 :

Year

Sales

Forecast

2003

7

9

2004

12

10

2005

14

15

2006

20

22

2007

16

18

2008

25

21

Calculate the MAPD and express it in decimal notation. Please express the result as a number with 4 decimal places. If necessary, round your result accordingly. For instance, 9.14677, should be expressed as 9.1468

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Title: The following sales data are available for 2003-2008 :