Given the stream of consciousness rationale, provide a reasonable question and answer. Rationale: He needs to buy enough tokens for 240 games because 4 x 60 = 240. He needs to buy 480 tokens because 2 x 240 = 480. He needs to spend 160 because 480 / 30 = 16.
 The question and answer:
Oliver has 4 friends that he is inviting to a party at the arcade. Game tokens cost 30 for $1. Each game costs 2 tokens. If he wants all his friends to get to play 60 games each, how much will it cost?
The answer is 16