Added RecordID for convenience. Calculate the total number of days for each period. Decided to keep 2 periods per row and just duplicate the tools. Might reconsider that in a real production app. Create rows for each day of each period; use formulas to establish the date and day of week for each row; filter out Sat/Sun rows; count remaining days. Then rejoin all the data using RecordID and display period counts by Month-Year.