Minus workdays from dates

02/18/18 Edited 12/09/19


I'm trying to minus days from dates using the following formulas but am getting errors everytime:

=NETWORKDAY([Date Printed]8 - [Date Dispatched]8) - gives me the error #Incorrect Argument Set

=NETWORKDAY([Date Printed]8, [Date Dispatched]8) - gives me #Invalid Data Type


What i'm trying to do is find out how many days it takes for an order to be dispatched, i have one column with the [Date Printed] and another column with [Date Dispatched].  

SUM([Date Dispatched]11 - [Date Printed]11) works, but i want to exclude Saturday/Sundays.


Appreciate any help, thanks,


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