Let ( Digits = Filter ( Self ; 9876543210 ) ;
If ( Not IsEmpty ( Digits ; Your original calc goes here, but use Digits in place of fiter ( self ; ... )
) // let
You might find this thread of interest: Formatting a text as phone number
Thanks Phil...that works perfectly. Also thanks for the link...I learn best from seeing examples and working through them so this was very interesting for me.