Count conditional formatting formula

Ok, I've searched quite a bit on this topic and i still can't find what i'm looking for.

I have two columns, both with dates, one for completion and one for delivery.

I have set up conditional formatting to highlight the delivery column in green if the date is less than or equal to the completion date + 14 days and red if the delivery date is greater than 14 days after the completion date.

Completion Delivered ConditionalFormattingColour
12/05/2013 14/06/2013 Red
30/01/2013 08/02/2013 Green
09/05/2013 14/06/2013 Red
31/01/2013 08/02/2013 Green
31/01/2013 08/02/2013 Green
01/02/2013 08/02/2013 Green
12/02/2013 06/03/2013 Red

What i'm trying to do now is have a single cell which shows how many delivery cells are green (i.e. delivery cells that are <= completion +14). For the above example i'm looking for a cell with 4 in.

I've tried countif and countifs and sumproduct but i can't for the life of me figure out how to get the cell range to add 14 days to each cell and count the number of cells that have a delivery date less than or equal to 14 days later the completion date. I'm not that concerned with counting the number of cells that meet the conditional formatting colour criteria as i've seen that i'd need to write some vba to do this and i'm not wanting to go down that route just yet. I'm sure there is a formula that can be written for this, but i'm not clever enough to figure it out just yet.

Hopefully i've attached a sample of the cells with the current conditional formatting and any help with this would be greatly appreciated.

CountCFDates.xlsx

Tony - Thanks, but it doesn't give the right results (I've also tried variations on it to no avail)

Fotis - A seperate column/s is something that i would rather avoid if i can do it all in one cell formula. Just heading home now, but will have another crack at it tomorrow.

Thanks

Ok, so Martin and Tony, i tried this at home and it does appear to work here so i'm not sure what i was doing earlier. I'll try it again in the office tomorrow, but it does look a little like it's doing what i want. A hopeful thank you.

Ok, i'm now back in the office and i've tried out a few variations and i've got it to work.

My actual spreadsheet had some slightly different entries to the sample i posted and that was where i was getting errors - i had some text next to the date in one cell and some blank cells in the delivered column which were giving me errors. I took out the text (which wasn't too important and i can have it as a comment) and altered the formula to not count blank cells.

My final formula (specific to my actual spreadsheet cells rather than the demo cells) is:

=SUMPRODUCT(IF(V8:V36="",0,(--(V8:V36<=T8:T36+14))))

and it's entered as an array formula (CTRL+SHIFT+ENTER)

Thanks for all the help, query solved!