Solution for the challenge is attached, this weekly challenge gave me chance to explore and practice some interface tools like drop down list and action, and how to update formula expression with the Action tool
Some of the app results are:
Happy learning and cheers
In order to NOT hardcode the position list, I wanted to generate a list of the possible values and feed that into the Drop Down tool. The only way I could make it work was to write to a .yxdb database, and then read from there as an external source in the drop down tool. Then to avoid file conflicts I had to separate the apps and chain them. Is there a better way?