Add up values only if 2 criterias correspond

I need a formula to do the following :-
look in column J for text "ET"
look in column R (same line) for text "POLH", then,
only if the 2 criterias corrospond add values shown in (same line) column T

ie If ET was in col J but "POP" was in column R (same line) the value in column T (same line)would not be included in the total returned.

Best I can come up with (sadly!)
=SUM(IF($J$5:$J$5000="ET",ANDIF($R$5:$R$5000="POLH"),$T$5:$T$5000))

...which returns the total value of column T - and if I make it a CSE formula the cell shows "#name?"

Hopefully one of you kind people will interpret the above and help me out !