Form no 108 urgent

I have completed my articleship more then month ago. I just want to know in Form no 108 . while dividing the working days in to weeks i  should exclude sundays or include it.?

For Eg:- Total days 1278, leave availed- 150, balance working days - 1218

I want to know whether i divide the balance figure in to weeks or exclude sundays from this figure then divide.

Please help its urgent.