Reply to post:

After you take the net figure having subtracted all the subsidies paid to agriculture and other EU payments to various schemes. There remains the additional costs of managing things that once were managed by the EU and now you have to do yourself. Like for instance ensuring that you have a workable import/export system in place, and that you can administer your trade deals between 190+ countries. They'll also have the additional expense of doing immigration control of EU citizens, etc. They'll need to manage the legal system that they are reclaiming from the EU and they'll need to police those laws too. The extra administrative costs they are taking on are substantial.