excel formula to calculate days result achieved or not achieved

dear experts


i want calculate total time and day between start/end time and result (achieved /not achieved). from total day
condition if total day less than 1 one day is achieved if zone is a and sl is nd
condition 2 if total day is less than 2 two day is achieved if zone is b,c,d or sl is 2bd,3bd,4bd
if start time is saturday and end time also saturday means achieved other sunday not calculate


please find the attachment

You need to use lower case first of all