Tutorial from build calculation

[Kal_Lam]

@Savechilds, we would appreciate it if you would avoid making multiple posts for the same issue. FYR:

How to correctly apply datedif function in kobo form

@Savechilds, you could do it as outlined in this post discussed previously: https://community.kobotoolbox.org/t/calculate-number-of-days-between-2-dates/5700/6