@luswetiopicho, you could have a look at the sample shared below, the exact copy of what @Xiphware has outlined above:
In the survey tab of your XLSForm:
Data entry screen as seen in Enketo:
Reference XLSForm:
Calculate Days.xlsx (10.3 KB)
@luswetiopicho, you could have a look at the sample shared below, the exact copy of what @Xiphware has outlined above:
Calculate Days.xlsx (10.3 KB)