I tried what you suggested and it gives me this error:
"Formula error -- Bad or missing arguments in function call
The types of the arguments or the number of arguments supplied do not meet the requirements of the function WeekdayAdd.
The function WeekdayAdd can be used with the following arguments:
WeekdayAdd (Date d, Number n).
WeekdayAdd (WorkDate d, Number n).
You may need to do one of the following to fix the problem:
Choose the right number and type of arguments.
Use a type conversion function to convert the arguments you are using to the correct type.
Choose a different function."
