A column chart shows a breakdown of retail petrol prices in six Queensland locations (Brisbane, and the top five most expensive regional centres: Longreach, Mount Isa, Blackwater, Emerald and Charters Towers). Brisbane breaks down the total cost in detail, while the other areas group all costs apart from retail margin together. The average retail price is highest in Longreach, followed by Mount Isa, Blackwater, Emerald and Chaters Towers. It shows Brisbane's indicative retail margin is the lowest at 16.9cpl, with margins of 34.3 in Longreach, 25.4 in Mount Isa, 33.6 in Blackwater, 31.6 in Emerald and 23.5 in Charters Towers.