Rollover Futures Contract - Please Explain

Say, I hold 10 qty of CRUDEOIL Oct contract (Current Price = 3400) and I wish to rollover to Nov contract (Current Price = 3380). How can I do this and what will be the price when I rollover?

You have to sell this and buy next. Month contract http://tradingqna.com/37558/please-explain-futures-and-options