3 variables (collumns) to be combined in 1 variable (collumn) : [1] click on the photo to see the demo data

Either in Excel or in SPSS
To combine the 3 colluns into 1 and to be able then to calculate the statistics of the collumn. Mean Median Moden Frequencies and all these.
Anny help would be appreciated.
Thank you in advance.


  [1]: http://i.stack.imgur.com/B5BPz.jpg