elapsed time average calculcations

Hey guys,

Here is my situation. I have a formula in Column F that is:

=INT(D3-C3)&" days, "&INT(24*MOD(D3-C3,1))&" hours, and "&ROUND(60*MOD(24*(D3-C3),1),0)&" minutes"

It takes the time from column c and d and shows the elapsed time. What I need to do now is make a field in for example F 30 that shows the average elapsed time. In other words, average up all the elapsed times in Column F. I can't figure out a way to do this..

Also, I have the formula above all the way down the spreadsheet. Is there a way to hide "0 days, 0 hours, and 0 minutes" if there is nothing in the C and D columns?


I've attached the spreadsheet..


Thanks in advance!