Users should only be able to select one response form a group and then these response should be summed at the bottom

@Ash, 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 XLSForm:

Image 2

In the settings tab of your XLSForm:

Image 3

Data entry screen as seen in Enketo:

Reference XLSForm:

Workbook.xlsx (12.9 KB)