What it costs to make a twenty pound note??
I found this on Canadian bank notes: Take, for example, a $20 bill, which is the most highly used denomination. At an average interest rate of 5 per cent, one $20 note in circulation produces revenue of about $1 per year. The production cost of this note is 6 cents for a life of about three years, which yields a cost of 2 cents per year. If average annual distribution expenses of about 2 cents are added to this cost, the result is an average annual cost of approximately 4 cents to put this note in circulation and replace it when it is worn. The Bank of Canada thus clears an annual net revenue of about 96 cents for each $20 note in circulation. However – you have to think of the costs of making the original casts, proofing the notes, storing and transporting them.
