Frank Ledwidge, author of damning study Investment in Blood, says failing, bloody campaign has cost £37bn - £2,000 per UK household.
Since 2006, on a conservative estimate, it has cost £15m a day to maintain Britain's military presence in Helmand province. The equivalent of £25,000 will have been spent for every one of Helmand's 1.5 million inhabitants, more than most of them will earn in a lifetime.
And when we leave...
I could think of a few things that money could have been spent on...