My formula runs slow when changing it.

I tried to change this formula from 2000 to 49999 lines to check because my report increased but it is taking for ever for excel to change these 6 values. Also when i did this it stopped counting all cells. O29 and P29 are date references FOR (029=12/01/16 P29=12/31/16). A column just equals 8568 and the rest counts the cells in I column if it is a unique number to the ones it found to be true. Did I screw up somewhere

=SUMPRODUCT(--(JOET!$H$1:$H$49999>=O29),--(JOET!$H$1:$H$49999<=P29),--(JOET!$A$1:$A$49999=8568),--IF(JOET!$I$1:$I$49999<>0,IF(1/COUNTIF(JOET!$I$1:$I$49999,JOET!$I$1:$I$49999)=1,1,0)))

EDIT: Here is an example of what should make the count 1.
---A-----B----------C----------D-----------E---------F-----------G-----------H----------I---
8568---12/28/16---$16.44---$16.44-----$221.44---$205.00-----$205.00-----02/29/16--5628399