Work out email age in Power BI (Excluding weekend and holiday days)

[Woodsa]

I have three tables, Public Holidays which contain (Date, Holiday Binary (1 for each date that is a holiday date)), CalDates that contains (Date, WorkingDay_Mark (1 for working day, 0 for non working day)) and Deployment_Mailbox that contains (Date Received (Date the email was received))

I need to create a formula to show the age of an email from Deployment_Mailbox (Date Received) minus any weekend days and holiday days

Not sure if this would need to be Power Query M or DAX

I have got this far with it, this gives me the age minus weekends, but I can't work out how to also minus any holiday dates.

I created a SatSuns measure:

SatSuns = 
Countrows (Filter (
         CALENDAR(Min(Deployment_Mailbox[Date Received]),TODAY() ),WEEKDAY([Date],2) > 5)
                     )

CAL_AGE = 
DATEDIFF(
    MIN(Deployment_Mailbox[Date Received]),
    TODAY(),
    DAY
) - [SatSuns]