I have a question with "multiple choice with comments"
so the question is "select only the items you have" and the subquestions are phones, pads, Notebook..
In the commet box of each subquestion the imput is only numbers (number of phones, pads, Notebooks have).

I need to set all the numbers entered in the selected choices to get a total of 100

For example ,
if i only choose subquestion SQ1, the commet will auto been filled 100.

if i choose subquestion sq1.sq2, i fill the commet of sq1 is 40 ,and the commet of sq2 will been auto filled with 60 .

I think this would be confusing for respondents and really don't see how it could work. What if I select sq1, sq2 and sq3, then add a value to sq1? What should sq2 and sq3 be auto filled with?

firstly ,thanks for tpartner.
if i select sq1 sq2 sq3 , i have to add a value to sq1 sq2 ,then the last one will be auto filled with .

also , if i select sq1 sq2 sq3 , i add the value of sq1 sq3 ,then sq2 will been auto filled with ..

So. Can it work like this ?

Sorry, I don't see a way to handle the other two inputs if one is changed.