Over the years, the material devastation wrought by bombers has been stupendous, and the civilian death toll beyond calculation.
"If it's based on the Mersey Tunnels tolls, we have done a calculation and it's going to cost us in excess of £13,000 a year," he said.
With the goal of maximizing drivers' welfare, the authors discuss what kind of pricing information should be given to the drivers and the usefulness of letting the drivers know the toll price before the route calculation versus just at the toll booth.
Before the latest UN-commissioned survey it had been estimated that up to 45,000 people had perished during the conflict; the up-to-date calculation increases the death toll by a third.
The audit examined the calculations used in justifying proposed toll increases in July 2008, January 2009, July 2009 and January 2010.
Vietnam took a high toll, but perhaps, as the current anguished calculations about Afghanistan indicate, it left the United States a more mature, sensible and smarter country.
The hardest part of his job, though, isn't the negotiations and calculations but witnessing the enormous emotional toll that financial problems have taken.
For instance, the study puts the 2000 toll at 535,000, almost 200,000 lower than previous calculations.
The emotional toll and the impact on physical health are beyond calculation.
The health ministry put the total death toll at six, suggesting that according to the Brotherhood's calculations it sustained far more casualties than its opponents.
