To calculate No of days in a report

We had a situation to generate a report, where we need to calculate the number of days the order was in each and every department. We are saving this information by jobstatus and job date. To get the number of days the job was in hold in each department we had find the datediff between the first vs second date.

To get the report generate in SSRS we use the funtion under the code area. The code area in SSRS is in Report - Properties --- code

We had used the below code to calculate the No of days, but note this includes the saturday and sunday.
--************************************************************************************
dim gd_Date1 as datetime = "1900-01-01"dim ln_DtDif as integerdim lotno1 as string
public function No_of_days (transdate as datetime,date_received as datetime,lotno as string) as integer
if lotno1 <> lotno Then
ln_DtDif = datediff ("d",date_received,transdate)
else ln_DtDif = datediff ("d",gd_Date1,transdate )end if
gd_Date1 = transdatelotno1 = lotnoreturn ln_DtDif
end function