EXAMPLE 1 - If today's date is September 23, 2015 then I want the formula to return Friday August 14, 2015 instead of Saturday August 15, 2015.

EXAMPLE 2 - If today's date was January 8, 2016 then I want the formula to return December 15, 2015.

The following formula returns the 15th day of the previous month, but I need to add in the weekend/weekday condition:

var Date LastMonthToday = AdjustMonth(Today(), -1);

Date(Year($LastMonthToday), Month($LastMonthToday), 15)

Thanks

EXAMPLE 2 - If today's date was January 8, 2016 then I want the formula to return December 15, 2015.

The following formula returns the 15th day of the previous month, but I need to add in the weekend/weekday condition:

var Date LastMonthToday = AdjustMonth(Today(), -1);

Date(Year($LastMonthToday), Month($LastMonthToday), 15)

Thanks