Ryan and Andy have some carnival tickets. If Ryan sells 10 tickets per day and Andy sells 5 tickets per day, Ryan will have 40 tickets left when Andy has sold all his tickets. If Ryan sells 5 tickets per day and Andy sells 10 tickets per day, Ryan will have 70 tickets left when Andy has sold all his tickets. (a) How many tickets does Ryan have? (b) Each ticket cost $12. If Ryan and Andy manage to sell all their tickets, how much more did Ryan collect than Andy?

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