I've been searching the internet for the past 1.5 days and have yet to find
an example of the formula I'm looking for.... so if this is easy, I apologize
in advance.

I want a count of the number of cells where column "I" values = "NA" and
column "D" values = "0". In the example below, only the 2nd & 5th rows would
meet the criteria.

I D
NA 5
NA 0
xx/xx/xx 0
xx/xx/xx 0
NA 0
xx/xx/xx 7
NA 3