Given the reply to Ant's question, I would challenge MI to confirm if he specifically wants 0.5 rounding down or not.
Cus ROUND(x)-0.1 (or whatever) is far nicer than that big multi-storey thing.
Agreed, it is against what we're taught, but these petrol people have funny rules about prices.
It made a bit of sense when petrol was 35.9p a litre, but now that its over a pound, sticking to the 0.9p principle is just silly.