Helpfully, our friends in the EU have just published:-
Infographics - EU budget explained: expenditure and contribution by member state
http://www.europarl.europa.eu/news/en/news-room/20141202IFG82334/eu-budget-explained-expenditure-and-contribution-by-member-state
Here's the 'infographic' showing the UK's contribution:-
Amazingly if you divide the total by 52 you get, erm, roughly €350m a week (almost the sort of figure you could stick on the side of a bus?)
Oh, and we also passed over 75% of €4.27bn ( €3.2bn) in tariffs for goods coming in through the UK.