How to calculate the income per preson and prefill a select_one question?

@Ghassan_wilson, maybe you could do it as outlined in the image shared below:

In the survey tab of your xlsform:

In the choices tab of your xlform:

Image 2

Data entry screen as seen in Enketo:

Data entry screen as seen in Enketo:

Data entry screen as seen in Enketo:

Data entry screen as seen in Enketo:

Data entry screen as seen in Enketo:

Reference xlsform:

Livelihood.xlsx (11.5 KB)