How much tax does Apple pay, and why doesn’t it pay more?

Apple's been presented with the mother of all tax bills: a whopping 13 billion euros in outstanding taxes, payable to the Irish government. But the Irish government doesn't want it - nor, indeed, do 47 percent of the Irish people - and Tim Cook calls it "political crap". Confused? We explain Apple's curious tax setup in this complete guide to Apple and its taxes