No RPRF fees at initial stage.
Read more regarding fees:
http://www.cic.gc.ca/english/information/fees/fees.asp#visas_permitsRead point : 2. Applications for visas and permits
(Canadian dollars)you have to send application fees in CAD $ along with application, below is the application fees, I suggest you to send Bank Demand Draft.
Other classes of applicants
Principal applicant
$550 A family member of the principal applicant who is 22 years of age or older, or is less than 22 years of age and is a spouse or common-law partner
$550 A family member of the principal applicant who is less than 22 years of age and is not a spouse or common-law partner
$150 RPRF fees Local CHC will send you request at the most of with medical or after medical thats depend on CHC (once you got RPRF fees request means your case finalized and visa's on the way if everything is gona well with your application and process of your PR file after submition of all RPRF forms and FEES).
OMM