A currency converter to find the rather more stable Mars Bar (MB) value of modern-day, precarious currency amounts (¤).
Based on the theories of the late Nico Colchester who stated,
[The Mars Bar] is a long-established basket of staple commodities (cocoa, vegetable fats, milk solids, sugar) packaged with great consistency in the form of an ingot. As such it is a reliable unit of account certainly more reliable than gold, which is prone to speculation and it preserves a remarkably constant real value.
-- The Financial Times, 1981
Now, for your pleasure, the Mars Bar currency converter.