Is it cheaper to buy tickets at the box office or through ticketmaster? And is there a service charge for buying at the box office?

Day of show is never cheaper. At s venue like this. The price will remain the same. At a smaller venue the price will typically go up. Ticket fees are not waived by purchasing at the box office (most of the time) If the show doesn't sellout. You could get cheaper tickets last minute through places like, stub hub.

Look at other ticket retailers that buy up unwanted blocks of seats, like Live nation, StubHub and others you see advertised on TV.

I think their box office goes through Ticketmaster anyway. There's a bunch of service charges no matter where you buy them because they include parking in their ticket fees.

If u weight for the day of the show is cheaper but there might not be any tickets left so that's your choice