I am currently using the following formula to count the number of times an
item is in column "Complete_Date_May" is blank, when there is a date in
"Post_Date_May" greater than 27 days old.

=SUMPRODUCT(--(Post_Date_May<""),--(Post_Date_May<TODAY()-27),--(Complete_Date_May=""))

This gives a total figure of outstanding post. I now wish to add that the
corresponding name in column F must equal "Becky". I have tried the following:

=SUMPRODUCT(--(Post_Date_May<""),--(Post_Date_May<TODAY()-27),--(Complete_Date_May=""),--($F2:$F9999=$J2))

Where J2 currently shows the name Becky. This however is returning #VALUE.

How can I add this extra variable to my original formula?