You have a lot of apples. You sell 50 apples to the EU for a £1 each, and you sell 50 to the rest of the world (ROW) for £1.20 (Germany sells 80 btw). That's 100 apples, £100. (the £20 is tariffs)
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While this is what you implied, I don't think this is what you meant, so I'll move on.
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