From the mass consumption, calc the volumetric consumption by fuel by country
Calculate the weighted average price for all countries: Multiply the price by the consumption Summate for all countries Divide total by the total consumption (where prices are non-zero)
For the real prices, divide each price by the appropriate HICP (2005 = 1) and repeat 2
'Gasoline' equivalent price is obtained by: Multiply the fuel price by the consumption and divde by its energy relative to unleaded petrol Summate for the three fuels and divide by the total consumption
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