1. Based on the calculation of annual fixed expenditure and annual running cost, compares some heat and cold source schemes with annual current expenditure method.

2. Consumable items would be posted as a day-to-day running cost of your business, so they reduce its profit in the profit and loss account.

3. What's fascinating about these signs is they cost about 10 percent of the running cost of a conventional speed camera, but they prevent twice as many accidents.