Adding weekend days to Weekdays

[vsap2000]

Hello,

I have 3 dates TC_Date, TS_Date, TE_Date. I have to count number of exact weekdays

LineDays = Num(Networkdays(Tc_Date,TS_Date)-2 + (1+Frac(Tc_Date) + Frac(Ts_Date),'#0.00')

WkDays = Num(Networkdays(TS_Date,TE_Date)-2 + (1+Frac(TS_Date) + Frac(TE_Date) ,'#0.00')

TotDays = Num(Networkdays(Tc_Date,TE_Date)-2 + (1+Frac(Tc_Date) + Frac(TE_Date), '#0.00')

TotHours = Num((Networkdays(Tc_Date,TE_Date)-2 + (1+Frac(Tc_Date) + Frac(TE_Date))*24, '#0.00')

these all expressions gives correct Num of Weekdays & hours but if either of Dates fall on weekend I get # of days & hours  in negative, it's not calculating correctly.

So my requirement is if TC_Date falls on weekend Saturday use previous day Friday if Sunday use next day Monday, if TS_Date falls on Saturday/Sunday use next working day that is Monday, TE_Date falls on Saturday/Sunday use Monday, can anyone help me how to add working days to above expression?

Thanks in advance.