Summarize wit filters by sum

Hi all

from a DB, here the link, I made this summarize funcion:

I need to filter the summarize according the total units achived

- by each MATRICOLA(distinct)

- for each hour

- when the sum of TOTAL is higher than 8

For example, if I make a easy excel pivot table it results:

* On 11/02, filter TIPO=PK, ORA=7 --> Ops nr=15, and 487 units picked

BUT I would to count and to sum, only the sum of total units per ORA, per MATRICOLA higher than 8. So I should have:

* Ops nr = 13, Units picked= 470

Moreover, according this logic, I need to extract thise formula:  pieces/ops nr

Do u know if exists a way to achive it?

Thanks a lot in advance

Andrea