Lookupvalue / Calculate value with filters WITHOUT relationship

Hi guys,

I have 2 tables in my report. 1 source table called Staffel. I need "Required personnel". The Role in this table is always "VPK".

In my second table, I need the "Required personnel" from my first table. I want to create a way (perhaps lookupvalue or calculate values with filter.) to find the right amount of "required personnel". I (think I) need to combine / match the records of both tables. So I have matching records: start time, stop time, department code, day of the week and VPK. I only need records for role / work type VPK. How can I solve this without having relationships between tables? Besides that: in the table below I don't have a role / work type VPK. I have to make sure that the results below only give me VPK as Role or Work Type.

*edit: my sample file is now only a couple of mb's so feel free to check it. You can find my sample file here

I hope you guys can help me. I would really appreciate some help. Thanks!