I charge the tour (not per person).
The mayor of Rio recently determined that purchases for tickets for the Corcovado train (Christ statue) and/or the Sugar loaf cable-car be made online in advance, so as to avoid huge line-ups, which had disturbed local residents. It may appear a hassle at first, but believe me, it's a pleasure to be able to avoid those huge high-season (Nov.-Apr.) line-ups.
The client must make the purchases online, because only he/she will be allowed to pick up the tickets on site. IMPORTANT: Keep the voucher(s) and reservation code(s) in a safe place, and be sure to bring the credit-card(s) you used.