Average call duration made per day

Hi Guys,

Someone of this forum kindly wrote the below for me.  This calculates the total time a person in making an external call. It works great but i an now trying to figure out how I can do an AVERAGE duration per day.  For example - there were 10:51:50 (ten hours, 51 minutes and 50 seconds) of calls made on a particular day.  There were 13 staff making these calls.  The Average external call duration based on this would be 00:50:08 (50 minutes 8 secs).

I have a measure which counts the number of staff (see below).  Is there a way to calculate the average?

Thanks

Count of Names = CALCULATE(counta(SQLNames[Full Name]))

--the below is the code to calculate the external calls duration

Total outbound time new measure = VAR Seconds1 = SUMX ( 'Calls SQL', SECOND ( 'Calls SQL'[Out Time] ) ) VAR Minutes1 = SUMX ( 'Calls SQL', MINUTE ( 'Calls SQL'[Out Time] ) ) VAR Hours1 = SUMX ( 'Calls SQL', HOUR ( 'Calls SQL'[Out Time] ) ) VAR Seconds2 = MOD ( Seconds1, 60 ) VAR Minutes2 = MOD ( TRUNC ( Seconds1 / 60 ) + Minutes1, 60 ) VAR Hours2 = Hours1 + TRUNC ( ( TRUNC ( Seconds1 / 60 ) + Minutes1 ) / 60 ) RETURN Hours2 & ":" & FORMAT ( Minutes2, "00" ) & ":" & FORMAT ( Seconds2, "00" )