This is from the information guide:
Step 3. Pay the Fees
Fee
Use the fee table in the Fee Payment Form – for Sponsors of Parents and Grandparents (IMM 5770) (PDF, 566 KB) to calculate the total amount of processing fees to be paid (all fees are in Canadian dollars). Processing Fees for the principal applicant and all accompanying family members must be included with this application. The Right of Permanent Residence fee will not be collected at this time. CIC will request it at a later date.
Payment method options
Only payment by certified cheque or credit card will be accepted using the Fee Payment Form – for Sponsors of Parents and Grandparents (IMM 5770) (PDF, 566 KB). Payment by credit card must be authorized for the total amount of processing fees required for the principal applicant and all accompanying family members. The credit card used must continue to be valid for at least nine months after the date on which the application is submitted.