Would you ask someone in the petrol industry to explain why petrol at the pump is priced to the third decimal place - a thousandth of a cent? Considering our smallest coin is a 10c piece, petrol price billboards are ridiculous. I find this even more ludicrous than dealers pricing a vehicle at $29,999.99. Ron Davis, Albany
Our fuel price is set by the international price of crude oil, the currency exchange rate, and taxes levied on fuel, which include GST, ETS and excise duty.
The AA's PetrolWatch spokesman, Mark Stockdale, says the average price for 91 octane is now $2.199 a litre, displayed as 219.9c a litre. If you bought 50 litres, it would cost $109.95; if it were rounded to $2.20 a litre it would cost $110 or an extra 5c.
Mr Stockdale says this type of pricing is common for bulk consumables such as petrol as well as groceries.