How do i update dynamically created dependent variables when the dynamically created independent variable changes?

How do i update dynamically created dependent variables when the dynamically created independent variable changes?

When my dynamic independent variable change, I have been able to create a handler that works. However, every time an independent varable changes, I need to change the three dependent variables.   I have not been able to get his to work.    There is a js fiddle at
 http://jsfiddle.net/ztgzkpus/5/ .
The fiddle only tries to update one dependent variable.  I figure it I can do one, I can do three.



It is a mystery to me.  The '. on' handler can find my dynamically created independent variable but not the dependent variables.   Please help me understand.