How should i write a pcr for this requirement?

Hi all,

how can i write a pcr for this requirement?

requirement:

if a person join the company after 15th of the month this quota for that month should not be generated and if a person takes lop for more then 5 days in a month proportionate quota for that month should be generated.

how should i go ahead of this requirement. i could able to stop generating the quota for a person if joins after 15th of the month but i am not able to go further with the pcr so that it calculate the proportionate quotas.

any suggestions plz.