Having worked in import and export for 11 years, you lot haven't a clue how screwed we'd be if we were independent. It's not just the duty, the VAT and the increased costs to import for customs declarations etc. A lot of stuff is imported into 1 member state as the costs are favourable there, then transported to UK to save us costs as the end consumer.
The amount we pay into the EU is pennies in the grand scheme of things, we get a lot out of it too remember. There are EU grants for regeneration, which we do get, but don't make a song and dance out of it. We the people can also be economic migrants, something I recently made use of, working in Spain. It's not just a one way street of people coming in. In fact, the British worker probably gets the better deal, as we are paid well here, and trained well, so command better wages abroad too. Those coming in are generally on the lower paid scale of things, because people here think the jobs are beneath them.
The press do a great job of poo pooing the EU, not just the Daily Mail, but then it's in their interests to do so. Don't just buy what they tell you, look into it yourselves