Price comparisons !

What does petrol and Coca-Cola have in common ?Very different pricing arrangements between city and country !The city of Wollongong is eighty kilometres south of Sydney and the price of petrol is usually constant with the Sydney priceCooma is three hundred and seventy kilometres distant from Wollongong, and the price of petrol is ten cents a litre dearer than Wollongong.By a strange comparison, Coca-Cola is the same price in Sydney, Wollongong and Cooma.Now Coca-Cola comes in bottles enclosed in cardboard shipping packs, is unpacked and put on store shelves - thus being labour intensive.Petrol is transported in B-double super tankers - surely a cheaper and more efficient method of handling.It would seem to be a fair question to ask why these two products have such a huge price discrepancy ?It seems that logic does not come into the equation !