Formula help please (If, And, Count?)

[TiNC701]

Hi, I have been trying to create a formula for R9 of the attached. I require it to add the cells in R8 (positive & Negative) but only upto and including that month, ignoring ones with "No data" then count how many columns had deliveries R6 again only upto and including that month. Then divide the sum of R8 by number of months with deliveries. For example
K9 will =(C8+D8+E8+F8+G8+H8+I8+J8)/7
But E9 = (C8+D8+E8)/3
If no deliveries then say "No data" like A9
I hope this makes sense, I have tried so many variations and just cannot get this to automate

 

[Fluff]

How about

=IFERROR(AVERAGEIF($B8:C8,"<>No data"),"No Data")

 

[TiNC701]

Thank you, unfortunately it doesn't quite work. When it gets to Column J it is dividing by 8 rather than the 7 months where deliveries were actually received. I need it to not count a cell in R6 if it is zero

 

[TiNC701]

How about

=IFERROR(AVERAGEIF($B8:C8,"<>No data"),"No Data")

 

[Fluff]

Ok, how about

=SUM($B8:C8)/(COUNTIFS($B6:C6,">0"))

 

[TiNC701]

Sorry isn't this the same as your first suggestion?

Ok, how about

=SUM($B8:C8)/(COUNTIFS($B6:C6,">0"))

That calculation works better thank you. Can it be combined with the IFError so if I have the first 3 months with No Data it says "No data"? I tried this IFERROR(SUM($B8:C8,"<>NO data")/(COUNTIFS($B6:C6,">0")),"No data) but that doesn't seem to work, as soon as I get to the first month with data it still inserts "No data"

 

[Fluff]

Just wrap my formula in an iferror.

 

[TiNC701]

Perfect thank you so much for your help

 

[Fluff]

You're welcome & thanks for the feedback.