Need help with averageifs function - keeps returning #DIV/0

My husband and I have been working on finding a solution for this problem and fear that we may end up breaking both of our computers if we do not find a solution soon.

We have a pivot table which is importing external data. We need to find averages per minute that match specific criteria. Our formula is as follows:

=AVERAGEIFS(C$5:C$50000,A$5:A$50000,M5,B$5:B$50000,P5)

I have attached a copy of our spreadsheet so that you can get a better picture of what we need help with. (You will note that all the averages are on the right side. I had to condense the amount of information on the spreadsheet in order to make the file size small enough to upload so it obviously doesn't go to 50000)

We attempted adding =if(C:C,<>0,C:C,C:C( which took away the #DIV/0, however, the averages weren't accurate.

PLEASE HELP