Too Expensive? Um... (Score 1)

So they say it's too expensive to modifiy the pumps. Alright, how much does it cost to put a 5$ thermometer in the fuel tank, and give them a spreadsheet with the cost difference, and a 2$ calculator. They can lower their prices when the fuel volume changes enough to affect the price by more than say, 3 cents per adjustment. Wouldnt that be fair?