"i.e. how much does it cost to renew"
The same price as it initially did. 60 for non-res and 80 for non and restricted.
"i.e. do you have to take the test again"
No, just send in the renewal and you'll have already been inssued one thus meaning you've already taken the course
"i.e. do you have to wait months for a renewal to be processed"
Since the CFC is composed of flying monkeys it's good to send ti in a few months early in case they get held up on their paperwork. You wouldn't want your license to lapse and make you a criminal >D