Having donei it twice, this is what I remember. If you have rented one, your cabin attendant brings it to your cabin on the second night, unless you need it for some reason on the first night. Then, they pick it up again. And I can't remember what night this happens. I believe it is the last night of the cruise, but, it may be the second to last night of the cruise.
The last time I think it was about $125.00, but this was for the "black and white," which included a black tuxedo jacket, a white dinner jacket, one pair of black slacks, two white shirts, a vest, a cummerbund, suspenders, a pair of socks, a tie, cufflinks, and studs. I wore everything, but the studs. Though, not at the same time, of course. You have to return everything, the cabin attendant checks to make sure everything is there, but, they let you keep the socks. Though, the information is somewhat unclear, I hope this helps. Enjoy!